Finding the Fourth Proportional to 85,139.48, 117,432.06 and 72,304.04

Step by Step Solution

1. Step 1: Write the proportion equation
   85,139.48 : 117,432.06 = 72,304.04 : x
2. Step 2: Convert to fraction form
   85,139.48/117,432.06 = 72,304.04/x
3. Step 3: Cross multiply
   85,139.48x = 117,432.06 × 72,304.04
4. Step 4: Simplify right side
   85,139.48x = 8,490,812,363.52
5. Step 5: Solve for x
   x = 8,490,812,363.52/85,139.48
6. Step 6: Final answer
   x = 99,728.26