Finding the Fourth Proportional to 16,217.76, 22,380.42 and 9,144.24

Step by Step Solution

1. Step 1: Write the proportion equation
   16,217.76 : 22,380.42 = 9,144.24 : x
2. Step 2: Convert to fraction form
   16,217.76/22,380.42 = 9,144.24/x
3. Step 3: Cross multiply
   16,217.76x = 22,380.42 × 9,144.24
4. Step 4: Simplify right side
   16,217.76x = 204,651,931.78
5. Step 5: Solve for x
   x = 204,651,931.78/16,217.76
6. Step 6: Final answer
   x = 12,619.00