Finding the Fourth Proportional to 22,638.97, 31,243.30 and 13,080.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,638.97 : 31,243.30 = 13,080.72 : x
2. Step 2: Convert to fraction form
   22,638.97/31,243.30 = 13,080.72/x
3. Step 3: Cross multiply
   22,638.97x = 31,243.30 × 13,080.72
4. Step 4: Simplify right side
   22,638.97x = 408,684,859.18
5. Step 5: Solve for x
   x = 408,684,859.18/22,638.97
6. Step 6: Final answer
   x = 18,052.27