Finding the Fourth Proportional to 42,128.92, 58,132.31 and 25,135.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.92 : 58,132.31 = 25,135.12 : x
2. Step 2: Convert to fraction form
   42,128.92/58,132.31 = 25,135.12/x
3. Step 3: Cross multiply
   42,128.92x = 58,132.31 × 25,135.12
4. Step 4: Simplify right side
   42,128.92x = 1,461,162,587.73
5. Step 5: Solve for x
   x = 1,461,162,587.73/42,128.92
6. Step 6: Final answer
   x = 34,683.12