Finding the Fourth Proportional to 16,142.30, 22,275.85 and 8,972.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,142.30 : 22,275.85 = 8,972.18 : x
2. Step 2: Convert to fraction form
   16,142.30/22,275.85 = 8,972.18/x
3. Step 3: Cross multiply
   16,142.30x = 22,275.85 × 8,972.18
4. Step 4: Simplify right side
   16,142.30x = 199,862,935.85
5. Step 5: Solve for x
   x = 199,862,935.85/16,142.30
6. Step 6: Final answer
   x = 12,381.32