TNOCF is driving me nuts!!!

Knowing the formula hasnt worked for me. Does anyone know what I’m doing wrong:

(550000) + [$187,000/1.12^5] + [$232,500/1.12^5] = $256,020

I cannot figure out how the $187,000 discounted at the rate above is $674,093…

My brain is tired…

No one can help you as you post has little context.