Finding the Fourth Proportional to 42,639.60, 58,839.34 and 23,520.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,639.60 : 58,839.34 = 23,520.09 : x
2. Step 2: Convert to fraction form
   42,639.60/58,839.34 = 23,520.09/x
3. Step 3: Cross multiply
   42,639.60x = 58,839.34 × 23,520.09
4. Step 4: Simplify right side
   42,639.60x = 1,383,906,572.34
5. Step 5: Solve for x
   x = 1,383,906,572.34/42,639.60
6. Step 6: Final answer
   x = 32,455.90