Finding the Fourth Proportional to 861,498.72, 1,292,456.16 and 270,522.72

Step by Step Solution

1. Step 1: Write the proportion equation
   861,498.72 : 1,292,456.16 = 270,522.72 : x
2. Step 2: Convert to fraction form
   861,498.72/1,292,456.16 = 270,522.72/x
3. Step 3: Cross multiply
   861,498.72x = 1,292,456.16 × 270,522.72
4. Step 4: Simplify right side
   861,498.72x = 349,638,755,883.96
5. Step 5: Solve for x
   x = 349,638,755,883.96/861,498.72
6. Step 6: Final answer
   x = 405,849.42