You also don't know how to spell Principal.
The value you want to put in the Principal column of your amortization table is the amount of the payment that goes to reducing the Principal balance of the loan. That is equal to the payment minus the amount of interest that has accrued in that period.
Year Payment Principal Interest Balance
0 $15,000.00
0.1 times the balance to get the accrued interest, $1500
4732.06 minus the interest of 1500 is the amount paid to principal, 3232.06
15000 minus 3232.06 is the new balance of $11,767.94
1 $4732.06 $3232.06 $1500.00 $11,767.94
Repeat the process for the other three years. You may be a few cents off at the end because of rounding errors. Just adjust the final payment to make it come out right.
John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it