Finding the Fourth Proportional to 687,018.52, 948,100.78 and 381,084.96

Step by Step Solution

1. Step 1: Write the proportion equation
   687,018.52 : 948,100.78 = 381,084.96 : x
2. Step 2: Convert to fraction form
   687,018.52/948,100.78 = 381,084.96/x
3. Step 3: Cross multiply
   687,018.52x = 948,100.78 × 381,084.96
4. Step 4: Simplify right side
   687,018.52x = 361,306,951,854.00
5. Step 5: Solve for x
   x = 361,306,951,854.00/687,018.52
6. Step 6: Final answer
   x = 525,905.69