Finding the Fourth Proportional to 928,949.72, 1,281,884.78 and 515,508.71

Step by Step Solution

1. Step 1: Write the proportion equation
   928,949.72 : 1,281,884.78 = 515,508.71 : x
2. Step 2: Convert to fraction form
   928,949.72/1,281,884.78 = 515,508.71/x
3. Step 3: Cross multiply
   928,949.72x = 1,281,884.78 × 515,508.71
4. Step 4: Simplify right side
   928,949.72x = 660,822,773,799.92
5. Step 5: Solve for x
   x = 660,822,773,799.92/928,949.72
6. Step 6: Final answer
   x = 711,365.49