Finding the Fourth Proportional to 16,229.28, 22,396.56 and 9,516.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,229.28 : 22,396.56 = 9,516.72 : x
2. Step 2: Convert to fraction form
   16,229.28/22,396.56 = 9,516.72/x
3. Step 3: Cross multiply
   16,229.28x = 22,396.56 × 9,516.72
4. Step 4: Simplify right side
   16,229.28x = 213,141,790.48
5. Step 5: Solve for x
   x = 213,141,790.48/16,229.28
6. Step 6: Final answer
   x = 13,133.16