Final answer:
Calculating the principal portion of a specific payment requires an amortization schedule. An exact answer cannot be provided here, but the process involves subtracting the monthly interest from the fixed payment amount to find the principal paid.
Step-by-step explanation:
The student's question relates to determining the principal portion of the 222nd payment of a fully amortizing loan. Unfortunately, without an amortization calculator or a specific formula, the exact principal portion cannot be calculated in this response.
However, generally, to find the principal portion of a specific payment for an amortizing loan, one would use an amortization schedule which takes into account the total loan amount, the interest rate, and the total number of payments (loan term).
With each payment made, the interest portion decreases and the principal portion increases due to the decreasing loan balance.
To begin, you calculate each month's interest by multiplying the remaining loan balance by the monthly interest rate. This value is subtracted from the fixed monthly payment amount to determine the principal portion for the month.