Finding the Fourth Proportional to 5,736.78, 7,912.29 and 3,847.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,736.78 : 7,912.29 = 3,847.74 : x
2. Step 2: Convert to fraction form
   5,736.78/7,912.29 = 3,847.74/x
3. Step 3: Cross multiply
   5,736.78x = 7,912.29 × 3,847.74
4. Step 4: Simplify right side
   5,736.78x = 30,444,434.72
5. Step 5: Solve for x
   x = 30,444,434.72/5,736.78
6. Step 6: Final answer
   x = 5,306.89