Finding the Fourth Proportional to 88,728.10, 133,092.15 and 42,072.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,728.10 : 133,092.15 = 42,072.10 : x
2. Step 2: Convert to fraction form
   88,728.10/133,092.15 = 42,072.10/x
3. Step 3: Cross multiply
   88,728.10x = 133,092.15 × 42,072.10
4. Step 4: Simplify right side
   88,728.10x = 5,599,466,244.02
5. Step 5: Solve for x
   x = 5,599,466,244.02/88,728.10
6. Step 6: Final answer
   x = 63,108.15