Finding the Fourth Proportional to 961,053.72, 1,326,256.53 and 525,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   961,053.72 : 1,326,256.53 = 525,499.31 : x
2. Step 2: Convert to fraction form
   961,053.72/1,326,256.53 = 525,499.31/x
3. Step 3: Cross multiply
   961,053.72x = 1,326,256.53 × 525,499.31
4. Step 4: Simplify right side
   961,053.72x = 696,946,891,397.99
5. Step 5: Solve for x
   x = 696,946,891,397.99/961,053.72
6. Step 6: Final answer
   x = 725,190.36