Finding the Fourth Proportional to 662,498.15, 914,178.77 and 372,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   662,498.15 : 914,178.77 = 372,142.31 : x
2. Step 2: Convert to fraction form
   662,498.15/914,178.77 = 372,142.31/x
3. Step 3: Cross multiply
   662,498.15x = 914,178.77 × 372,142.31
4. Step 4: Simplify right side
   662,498.15x = 340,204,592,789.15
5. Step 5: Solve for x
   x = 340,204,592,789.15/662,498.15
6. Step 6: Final answer
   x = 513,517.80