Finding the Fourth Proportional to 16,591.50, 24,863.49 and 12,355.59

Step by Step Solution

1. Step 1: Write the proportion equation
   16,591.50 : 24,863.49 = 12,355.59 : x
2. Step 2: Convert to fraction form
   16,591.50/24,863.49 = 12,355.59/x
3. Step 3: Cross multiply
   16,591.50x = 24,863.49 × 12,355.59
4. Step 4: Simplify right side
   16,591.50x = 307,203,088.41
5. Step 5: Solve for x
   x = 307,203,088.41/16,591.50
6. Step 6: Final answer
   x = 18,515.69