45 degree triangle diagonal not correct

Duh, I saw the decimal (0.041631) but forgot to convert it from feet to inches. I am redrawing the plans I purchased from an architect so I just assumed the rounded number (24’) he showed was correct and did not think about the conversion. I should have realized it was likely his math, as he rounded several values, and had errors (as much as 10’) in some of his measurements.

Thanks!