Finding the Fourth Proportional to 16,532.55, 22,814.29 and 8,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,532.55 : 22,814.29 = 8,978.72 : x
2. Step 2: Convert to fraction form
   16,532.55/22,814.29 = 8,978.72/x
3. Step 3: Cross multiply
   16,532.55x = 22,814.29 × 8,978.72
4. Step 4: Simplify right side
   16,532.55x = 204,843,121.91
5. Step 5: Solve for x
   x = 204,843,121.91/16,532.55
6. Step 6: Final answer
   x = 12,390.29