Finding the Fourth Proportional to 841,755.72, 1,161,279 and 621,520.82

Step by Step Solution

1. Step 1: Write the proportion equation
   841,755.72 : 1,161,279 = 621,520.82 : x
2. Step 2: Convert to fraction form
   841,755.72/1,161,279 = 621,520.82/x
3. Step 3: Cross multiply
   841,755.72x = 1,161,279 × 621,520.82
4. Step 4: Simplify right side
   841,755.72x = 721,759,076,328.78
5. Step 5: Solve for x
   x = 721,759,076,328.78/841,755.72
6. Step 6: Final answer
   x = 857,444.81