Finding the Fourth Proportional to 22,554.32, 31,131.20 and 13,124.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,554.32 : 31,131.20 = 13,124.72 : x
2. Step 2: Convert to fraction form
   22,554.32/31,131.20 = 13,124.72/x
3. Step 3: Cross multiply
   22,554.32x = 31,131.20 × 13,124.72
4. Step 4: Simplify right side
   22,554.32x = 408,588,283.26
5. Step 5: Solve for x
   x = 408,588,283.26/22,554.32
6. Step 6: Final answer
   x = 18,115.74