Finding the Fourth Proportional to 16,142.28, 22,276.40 and 8,972.32

Step by Step Solution

1. Step 1: Write the proportion equation
   16,142.28 : 22,276.40 = 8,972.32 : x
2. Step 2: Convert to fraction form
   16,142.28/22,276.40 = 8,972.32/x
3. Step 3: Cross multiply
   16,142.28x = 22,276.40 × 8,972.32
4. Step 4: Simplify right side
   16,142.28x = 199,870,989.25
5. Step 5: Solve for x
   x = 199,870,989.25/16,142.28
6. Step 6: Final answer
   x = 12,381.83