Finding the Fourth Proportional to 16,617.40, 24,795.89 and 16,520.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,617.40 : 24,795.89 = 16,520.20 : x
2. Step 2: Convert to fraction form
   16,617.40/24,795.89 = 16,520.20/x
3. Step 3: Cross multiply
   16,617.40x = 24,795.89 × 16,520.20
4. Step 4: Simplify right side
   16,617.40x = 409,633,061.98
5. Step 5: Solve for x
   x = 409,633,061.98/16,617.40
6. Step 6: Final answer
   x = 24,650.85