Will using surge protectors with a two prong outlet adapter help against power fluctuations
First, I'd suggest looking at Is is safe to plug a surge protector into a 2-prong outlet using a 3-to-2-prong adapter?.  That may answer your question.  I'd also suggest looking at the outlet box and seeing if it's already grounded, in which case you could just replace the outlet.

However, if it's protection against power fluctuations you want, I'd suggest a UPS, not a surge protector.  They have an internal battery, and if you buy an Online/double-conversion UPS, the battery is always what's providing the power.  They may well not like being without a ground.