Most style sheets recommend spelling out the numbers one to ten, then using numerals for the higher numbers. Some suggest spelling out one to twenty, which are common and short. In any case, there is no fixed rule, but numbers within a phrase should use the same form, as in "3 out of 100" or "4th place among the 240 starters", rather than spelling one and using a numeral for the other.
Fourth
That is the correct spelling of "fourths" (meaning the plural of one-fourth).
In French, "fourth" is spelled "quatrième."
Sam
Eighty fourth.
You already spelled one fourth correctly in your question.
forty-fourth
All you have to do is study. Spell it looking at the paper and spell it not looking at the paper until you get better at it.
The noun paper in Spanish is papel.
This is in two words, "twenty fourth," hyphenated in the US as twenty-fourth (24th).
automobile diploma 4th semester paper
That is the correct spelling of "recycled paper" (paper that is made at least partly from old paper).