Finding the Fourth Proportional to 22,168.64, 30,589.86 and 13,217.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,168.64 : 30,589.86 = 13,217.12 : x
2. Step 2: Convert to fraction form
   22,168.64/30,589.86 = 13,217.12/x
3. Step 3: Cross multiply
   22,168.64x = 30,589.86 × 13,217.12
4. Step 4: Simplify right side
   22,168.64x = 404,309,850.40
5. Step 5: Solve for x
   x = 404,309,850.40/22,168.64
6. Step 6: Final answer
   x = 18,237.92