Finding the Fourth Proportional to 16,781.50, 23,158.74 and 9,329.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,781.50 : 23,158.74 = 9,329.50 : x
2. Step 2: Convert to fraction form
   16,781.50/23,158.74 = 9,329.50/x
3. Step 3: Cross multiply
   16,781.50x = 23,158.74 × 9,329.50
4. Step 4: Simplify right side
   16,781.50x = 216,059,464.83
5. Step 5: Solve for x
   x = 216,059,464.83/16,781.50
6. Step 6: Final answer
   x = 12,874.86