Finding the Fourth Proportional to 498,446.16, 687,846.89 and 283,581.63

Step by Step Solution

1. Step 1: Write the proportion equation
   498,446.16 : 687,846.89 = 283,581.63 : x
2. Step 2: Convert to fraction form
   498,446.16/687,846.89 = 283,581.63/x
3. Step 3: Cross multiply
   498,446.16x = 687,846.89 × 283,581.63
4. Step 4: Simplify right side
   498,446.16x = 195,060,740,838.72
5. Step 5: Solve for x
   x = 195,060,740,838.72/498,446.16
6. Step 6: Final answer
   x = 391,337.63