Finding the Fourth Proportional to 16,128.28, 22,257.72 and 8,958.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.28 : 22,257.72 = 8,958.88 : x
2. Step 2: Convert to fraction form
   16,128.28/22,257.72 = 8,958.88/x
3. Step 3: Cross multiply
   16,128.28x = 22,257.72 × 8,958.88
4. Step 4: Simplify right side
   16,128.28x = 199,404,242.55
5. Step 5: Solve for x
   x = 199,404,242.55/16,128.28
6. Step 6: Final answer
   x = 12,363.64