Finding the Fourth Proportional to 22,616.20, 31,209.61 and 13,662.14

Step by Step Solution

1. Step 1: Write the proportion equation
   22,616.20 : 31,209.61 = 13,662.14 : x
2. Step 2: Convert to fraction form
   22,616.20/31,209.61 = 13,662.14/x
3. Step 3: Cross multiply
   22,616.20x = 31,209.61 × 13,662.14
4. Step 4: Simplify right side
   22,616.20x = 426,389,896.58
5. Step 5: Solve for x
   x = 426,389,896.58/22,616.20
6. Step 6: Final answer
   x = 18,853.30