fortuno

Check this one, because the obvious answer is wrong. Fortuno looks like forta, strong, with an ending on it, and the two do not share a root. Latin fortis, strong, comes from an older forctus and belongs to a family about height and firmness. Latin fortuna comes from fors, chance, from ferre, to bring - so fortune is literally what gets brought to you. The trap is unusually well set, because the genitive of fors is also fortis. The same five letters appear in both Latin paradigms meaning completely different things, which is how the confusion started and why it has lasted two thousand years. Strength is not luck.

Two fences, both worth drawing.Sorto is fate: what is going to happen, whether you like it or not, and it has no preference about you. Ŝanco is a chance in the sense of an opportunity - one specific opening, countable, and you either take it or you do not. Fortuno is luck running in your favour over time, and unless it is marked otherwise it leans positive: bona fortuno is emphatic rather than necessary, and malbona fortuno is the marked case.

The English money sense came late and Esperanto is careful about it. A fortune meaning a large pile of money is a metaphorical extension in English, and Esperanto will let you say li faris fortunon - but riĉaĵo or simply granda riĉeco is clearer if money is what you mean, and riĉa is the adjective. Keep fortuno for luck, and you will never be misread.