We will have to construct an amortization table as shown below to calculate the principal payment in the 4th payment
Month Payment Interest Principal Outstanding
0 175000.00
1 1135.05 984.38 150.68 174849.33
2 1135.05 983.53 151.52 174697.80
3 1135.05 982.68 152.37 174545.43
4 1135.05 981.82 153.23 174392.20
As per the above table. principal payment in the 4th payment = $153.23