Finding the Fourth Proportional to 272,500.83, 408,812.76 and 82,978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   272,500.83 : 408,812.76 = 82,978.15 : x
2. Step 2: Convert to fraction form
   272,500.83/408,812.76 = 82,978.15/x
3. Step 3: Cross multiply
   272,500.83x = 408,812.76 × 82,978.15
4. Step 4: Simplify right side
   272,500.83x = 33,922,526,521.19
5. Step 5: Solve for x
   x = 33,922,526,521.19/272,500.83
6. Step 6: Final answer
   x = 124,485.96