Finding the Fourth Proportional to 22,569.80, 31,149.86 and 12,879.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,569.80 : 31,149.86 = 12,879.27 : x
2. Step 2: Convert to fraction form
   22,569.80/31,149.86 = 12,879.27/x
3. Step 3: Cross multiply
   22,569.80x = 31,149.86 × 12,879.27
4. Step 4: Simplify right side
   22,569.80x = 401,187,393.01
5. Step 5: Solve for x
   x = 401,187,393.01/22,569.80
6. Step 6: Final answer
   x = 17,775.41