Finding the Fourth Proportional to 22,561.20, 31,124.52 and 13,609.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,561.20 : 31,124.52 = 13,609.08 : x
2. Step 2: Convert to fraction form
   22,561.20/31,124.52 = 13,609.08/x
3. Step 3: Cross multiply
   22,561.20x = 31,124.52 × 13,609.08
4. Step 4: Simplify right side
   22,561.20x = 423,576,082.64
5. Step 5: Solve for x
   x = 423,576,082.64/22,561.20
6. Step 6: Final answer
   x = 18,774.54