I am trying to manually calculate excels RATE() Fucntion...
I have the following info and need to find the rate.. how can this be done without excel?

total interest = 209,272.97
years in loan = 30
payments/yr = 12
total paymnets = 360
beg bal = 200000
ending balance = 0

answer should come out to 5.51%.
Any helps is greatly appreciated. Thanks!