Finding the Fourth Proportional to 16,391.07, 24,564.17 and 12,385.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,391.07 : 24,564.17 = 12,385.16 : x
2. Step 2: Convert to fraction form
   16,391.07/24,564.17 = 12,385.16/x
3. Step 3: Cross multiply
   16,391.07x = 24,564.17 × 12,385.16
4. Step 4: Simplify right side
   16,391.07x = 304,231,175.72
5. Step 5: Solve for x
   x = 304,231,175.72/16,391.07
6. Step 6: Final answer
   x = 18,560.79