Make sure you have all runes available - 1x El Rune, 1x Sol Rune, 1x Dol Rune, 1x Lo Rune - then put them into the sockets of the base item, in the correct order pictured below. Pay extra attention to this. The rune word is 'ElSolDolLo' for a reason, so if you don't socket it in the exact order, the result would not be 'Fortitude' (and instead you would end up with a bunch of runes socketed into the base item).
Take your desired base item, then socket the runes in this exact order:
Runewords can have a huge difference in value. In order to find out the worth of the Fortitude Runeword, we need to add up the value of the single runes, as well as the base item used for socketing. Every roll will require these basic ingredients and will get you the Fortitude Runeword with random stats. This can be defined as the minimum value. The higher the stats of the roll, the higher the final value of the runeword. A "perfect roll" in a superior base tends to be the most rare and hence much more expensive than a random roll.
Yes, we can offer the already rolled Fortitude Runeword for you in different bases listed below.
Alternatively, you may want to get the unmade version, where we'll deliver the runes plus the base item to you. You can then complete the socketing yourself (offering a chance for a perfect roll, which would be of significantly higher value).
Here's the list of Fortitude Runewords in various Base Items and Stats, which we can source for you from our network of trusted trade partners.
Non-Superior base Items can be easily found or bought from a vendor NPC in the city, so an easy option get Fortitude in D2R is to buy the single runes in a pack and socket the runeword yourself. You can either add the below listed runes to your cart and have them delivered to you, or head over to our runes list to find some more.
In any case, if you want to build the Fortitude Runeword, you will need the following runes: 1x El Rune, 1x Sol Rune, 1x Dol Rune, 1x Lo Rune