Finding the Fourth Proportional to 22,721.31, 31,352.31 and 12,648.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,721.31 : 31,352.31 = 12,648.42 : x
2. Step 2: Convert to fraction form
   22,721.31/31,352.31 = 12,648.42/x
3. Step 3: Cross multiply
   22,721.31x = 31,352.31 × 12,648.42
4. Step 4: Simplify right side
   22,721.31x = 396,557,184.85
5. Step 5: Solve for x
   x = 396,557,184.85/22,721.31
6. Step 6: Final answer
   x = 17,453.10