Finding the Fourth Proportional to 22,636.47, 31,237.72 and 12,564.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,636.47 : 31,237.72 = 12,564.88 : x
2. Step 2: Convert to fraction form
   22,636.47/31,237.72 = 12,564.88/x
3. Step 3: Cross multiply
   22,636.47x = 31,237.72 × 12,564.88
4. Step 4: Simplify right side
   22,636.47x = 392,498,203.27
5. Step 5: Solve for x
   x = 392,498,203.27/22,636.47
6. Step 6: Final answer
   x = 17,339.20