Finding the Fourth Proportional to 39,007.87, 58,520.59 and 12,355.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,007.87 : 58,520.59 = 12,355.47 : x
2. Step 2: Convert to fraction form
   39,007.87/58,520.59 = 12,355.47/x
3. Step 3: Cross multiply
   39,007.87x = 58,520.59 × 12,355.47
4. Step 4: Simplify right side
   39,007.87x = 723,049,363.24
5. Step 5: Solve for x
   x = 723,049,363.24/39,007.87
6. Step 6: Final answer
   x = 18,535.99