Finding the Fourth Proportional to 5,760.78, 7,949.89 and 3,242.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,760.78 : 7,949.89 = 3,242.91 : x
2. Step 2: Convert to fraction form
   5,760.78/7,949.89 = 3,242.91/x
3. Step 3: Cross multiply
   5,760.78x = 7,949.89 × 3,242.91
4. Step 4: Simplify right side
   5,760.78x = 25,780,801.90
5. Step 5: Solve for x
   x = 25,780,801.90/5,760.78
6. Step 6: Final answer
   x = 4,475.23