Finding the Fourth Proportional to 858,414.10, 1,287,621.15 and 503,598.10

Step by Step Solution

1. Step 1: Write the proportion equation
   858,414.10 : 1,287,621.15 = 503,598.10 : x
2. Step 2: Convert to fraction form
   858,414.10/1,287,621.15 = 503,598.10/x
3. Step 3: Cross multiply
   858,414.10x = 1,287,621.15 × 503,598.10
4. Step 4: Simplify right side
   858,414.10x = 648,443,564,659.82
5. Step 5: Solve for x
   x = 648,443,564,659.82/858,414.10
6. Step 6: Final answer
   x = 755,397.15