Finding the Fourth Proportional to 498,510.38, 687,940.79 and 272,155.88

Step by Step Solution

1. Step 1: Write the proportion equation
   498,510.38 : 687,940.79 = 272,155.88 : x
2. Step 2: Convert to fraction form
   498,510.38/687,940.79 = 272,155.88/x
3. Step 3: Cross multiply
   498,510.38x = 687,940.79 × 272,155.88
4. Step 4: Simplify right side
   498,510.38x = 187,227,131,449.42
5. Step 5: Solve for x
   x = 187,227,131,449.42/498,510.38
6. Step 6: Final answer
   x = 375,573.18