Finding the Fourth Proportional to 89,128.92, 133,715.31 and 25,949.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,128.92 : 133,715.31 = 25,949.60 : x
2. Step 2: Convert to fraction form
   89,128.92/133,715.31 = 25,949.60/x
3. Step 3: Cross multiply
   89,128.92x = 133,715.31 × 25,949.60
4. Step 4: Simplify right side
   89,128.92x = 3,469,858,139.80
5. Step 5: Solve for x
   x = 3,469,858,139.80/89,128.92
6. Step 6: Final answer
   x = 38,930.78