Finding the Fourth Proportional to 16,605.60, 24,915.72 and 8,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,605.60 : 24,915.72 = 8,812.50 : x
2. Step 2: Convert to fraction form
   16,605.60/24,915.72 = 8,812.50/x
3. Step 3: Cross multiply
   16,605.60x = 24,915.72 × 8,812.50
4. Step 4: Simplify right side
   16,605.60x = 219,569,782.50
5. Step 5: Solve for x
   x = 219,569,782.50/16,605.60
6. Step 6: Final answer
   x = 13,222.63