Finding the Fourth Proportional to 856,499.59, 1,283,347.82 and 518,515.83

Step by Step Solution

1. Step 1: Write the proportion equation
   856,499.59 : 1,283,347.82 = 518,515.83 : x
2. Step 2: Convert to fraction form
   856,499.59/1,283,347.82 = 518,515.83/x
3. Step 3: Cross multiply
   856,499.59x = 1,283,347.82 × 518,515.83
4. Step 4: Simplify right side
   856,499.59x = 665,436,152,660.86
5. Step 5: Solve for x
   x = 665,436,152,660.86/856,499.59
6. Step 6: Final answer
   x = 776,925.24