Finding the Fourth Proportional to 22,500.13, 31,049.25 and 12,939.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,500.13 : 31,049.25 = 12,939.29 : x
2. Step 2: Convert to fraction form
   22,500.13/31,049.25 = 12,939.29/x
3. Step 3: Cross multiply
   22,500.13x = 31,049.25 × 12,939.29
4. Step 4: Simplify right side
   22,500.13x = 401,755,373.74
5. Step 5: Solve for x
   x = 401,755,373.74/22,500.13
6. Step 6: Final answer
   x = 17,855.69