Finding the Fourth Proportional to 22,801.96, 31,463.49 and 12,729

Step by Step Solution

1. Step 1: Write the proportion equation
   22,801.96 : 31,463.49 = 12,729 : x
2. Step 2: Convert to fraction form
   22,801.96/31,463.49 = 12,729/x
3. Step 3: Cross multiply
   22,801.96x = 31,463.49 × 12,729
4. Step 4: Simplify right side
   22,801.96x = 400,498,700.57
5. Step 5: Solve for x
   x = 400,498,700.57/22,801.96
6. Step 6: Final answer
   x = 17,564.23