Finding the Fourth Proportional to 22,287.96, 30,758.20 and 12,217.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,287.96 : 30,758.20 = 12,217.30 : x
2. Step 2: Convert to fraction form
   22,287.96/30,758.20 = 12,217.30/x
3. Step 3: Cross multiply
   22,287.96x = 30,758.20 × 12,217.30
4. Step 4: Simplify right side
   22,287.96x = 375,782,049.42
5. Step 5: Solve for x
   x = 375,782,049.42/22,287.96
6. Step 6: Final answer
   x = 16,860.32