Finding the Fourth Proportional to 22,791.88, 31,454.37 and 12,722.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,791.88 : 31,454.37 = 12,722.28 : x
2. Step 2: Convert to fraction form
   22,791.88/31,454.37 = 12,722.28/x
3. Step 3: Cross multiply
   22,791.88x = 31,454.37 × 12,722.28
4. Step 4: Simplify right side
   22,791.88x = 400,171,302.36
5. Step 5: Solve for x
   x = 400,171,302.36/22,791.88
6. Step 6: Final answer
   x = 17,557.63