Hi,
It seems you’re forcing the full paragraph to align as a full block as in the attached screenshot1, is that correct?
If so, you need to adjust the paragraph justification so the last line will align properly instead of leaving big gaps between the words.
Open the paragraph menu and then click on the paragraph menu options. Select “Justify” options and put the top values as in the attached screenshot (sorry it’s in Spanish but you got the idea). That should fix the alignment of the last line as well.