Finding the Fourth Proportional to 22,638.03, 31,239 and 12,565.98

Step by Step Solution

1. Step 1: Write the proportion equation
   22,638.03 : 31,239 = 12,565.98 : x
2. Step 2: Convert to fraction form
   22,638.03/31,239 = 12,565.98/x
3. Step 3: Cross multiply
   22,638.03x = 31,239 × 12,565.98
4. Step 4: Simplify right side
   22,638.03x = 392,548,649.22
5. Step 5: Solve for x
   x = 392,548,649.22/22,638.03
6. Step 6: Final answer
   x = 17,340.23