Finding the Fourth Proportional to 22,315.72, 30,796.02 and 12,757.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,315.72 : 30,796.02 = 12,757.60 : x
2. Step 2: Convert to fraction form
   22,315.72/30,796.02 = 12,757.60/x
3. Step 3: Cross multiply
   22,315.72x = 30,796.02 × 12,757.60
4. Step 4: Simplify right side
   22,315.72x = 392,883,304.75
5. Step 5: Solve for x
   x = 392,883,304.75/22,315.72
6. Step 6: Final answer
   x = 17,605.67