Total participants from the five states:
Track =420+288+552+528+336=2124
Field =312+384+360+576+432=2064
Swimming =540+480+432+504+408=2364
"475% more than" means the original plus 475% of it:
100%+475%=575%, so the multiplier is 5.75
"525% of" gives a multiplier of 5.25
"4 times" gives a multiplier of 4
Track =5.75×2124=12213
Field =5.25×2064=10836
Swimming =4×2364=9456
Combined total =12213+10836+9456=32505