Finding the Fourth Proportional to 22,644, 31,249.20 and 12,708

Step by Step Solution

1. Step 1: Write the proportion equation
   22,644 : 31,249.20 = 12,708 : x
2. Step 2: Convert to fraction form
   22,644/31,249.20 = 12,708/x
3. Step 3: Cross multiply
   22,644x = 31,249.20 × 12,708
4. Step 4: Simplify right side
   22,644x = 397,114,833.60
5. Step 5: Solve for x
   x = 397,114,833.60/22,644
6. Step 6: Final answer
   x = 17,537.31