Finding the Fourth Proportional to 498,499, 687,925.10 and 272,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   498,499 : 687,925.10 = 272,144.50 : x
2. Step 2: Convert to fraction form
   498,499/687,925.10 = 272,144.50/x
3. Step 3: Cross multiply
   498,499x = 687,925.10 × 272,144.50
4. Step 4: Simplify right side
   498,499x = 187,215,032,376.95
5. Step 5: Solve for x
   x = 187,215,032,376.95/498,499
6. Step 6: Final answer
   x = 375,557.49