Finding the Fourth Proportional to 22,304.56, 30,780.48 and 12,871.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,304.56 : 30,780.48 = 12,871.24 : x
2. Step 2: Convert to fraction form
   22,304.56/30,780.48 = 12,871.24/x
3. Step 3: Cross multiply
   22,304.56x = 30,780.48 × 12,871.24
4. Step 4: Simplify right side
   22,304.56x = 396,182,945.40
5. Step 5: Solve for x
   x = 396,182,945.40/22,304.56
6. Step 6: Final answer
   x = 17,762.42