Finding the Fourth Proportional to 272,032.10, 408,086.55 and 85,024.10

Step by Step Solution

1. Step 1: Write the proportion equation
   272,032.10 : 408,086.55 = 85,024.10 : x
2. Step 2: Convert to fraction form
   272,032.10/408,086.55 = 85,024.10/x
3. Step 3: Cross multiply
   272,032.10x = 408,086.55 × 85,024.10
4. Step 4: Simplify right side
   272,032.10x = 34,697,191,635.86
5. Step 5: Solve for x
   x = 34,697,191,635.86/272,032.10
6. Step 6: Final answer
   x = 127,548.15