Finding the Fourth Proportional to 498,196.86, 687,526.86 and 283,367.88

Step by Step Solution

1. Step 1: Write the proportion equation
   498,196.86 : 687,526.86 = 283,367.88 : x
2. Step 2: Convert to fraction form
   498,196.86/687,526.86 = 283,367.88/x
3. Step 3: Cross multiply
   498,196.86x = 687,526.86 × 283,367.88
4. Step 4: Simplify right side
   498,196.86x = 194,823,028,761.26
5. Step 5: Solve for x
   x = 194,823,028,761.26/498,196.86
6. Step 6: Final answer
   x = 391,056.32