Finding the Fourth Proportional to 498,109.83, 747,383.51 and 261,397.18

Step by Step Solution

1. Step 1: Write the proportion equation
   498,109.83 : 747,383.51 = 261,397.18 : x
2. Step 2: Convert to fraction form
   498,109.83/747,383.51 = 261,397.18/x
3. Step 3: Cross multiply
   498,109.83x = 747,383.51 × 261,397.18
4. Step 4: Simplify right side
   498,109.83x = 195,363,941,892.50
5. Step 5: Solve for x
   x = 195,363,941,892.50/498,109.83
6. Step 6: Final answer
   x = 392,210.57