Finding the Fourth Proportional to 22,287.48, 30,761.28 and 12,854.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,287.48 : 30,761.28 = 12,854.76 : x
2. Step 2: Convert to fraction form
   22,287.48/30,761.28 = 12,854.76/x
3. Step 3: Cross multiply
   22,287.48x = 30,761.28 × 12,854.76
4. Step 4: Simplify right side
   22,287.48x = 395,428,871.69
5. Step 5: Solve for x
   x = 395,428,871.69/22,287.48
6. Step 6: Final answer
   x = 17,742.20