Finding the Fourth Proportional to 89,377.72, 133,862.37 and 42,663.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,377.72 : 133,862.37 = 42,663.40 : x
2. Step 2: Convert to fraction form
   89,377.72/133,862.37 = 42,663.40/x
3. Step 3: Cross multiply
   89,377.72x = 133,862.37 × 42,663.40
4. Step 4: Simplify right side
   89,377.72x = 5,711,023,836.26
5. Step 5: Solve for x
   x = 5,711,023,836.26/89,377.72
6. Step 6: Final answer
   x = 63,897.62