Finding the Fourth Proportional to 22,498.18, 31,053.50 and 12,939.11

Step by Step Solution

1. Step 1: Write the proportion equation
   22,498.18 : 31,053.50 = 12,939.11 : x
2. Step 2: Convert to fraction form
   22,498.18/31,053.50 = 12,939.11/x
3. Step 3: Cross multiply
   22,498.18x = 31,053.50 × 12,939.11
4. Step 4: Simplify right side
   22,498.18x = 401,804,652.39
5. Step 5: Solve for x
   x = 401,804,652.39/22,498.18
6. Step 6: Final answer
   x = 17,859.43