Finding the Fourth Proportional to 5,238.47, 7,850.22 and 3,940.85

Step by Step Solution

1. Step 1: Write the proportion equation
   5,238.47 : 7,850.22 = 3,940.85 : x
2. Step 2: Convert to fraction form
   5,238.47/7,850.22 = 3,940.85/x
3. Step 3: Cross multiply
   5,238.47x = 7,850.22 × 3,940.85
4. Step 4: Simplify right side
   5,238.47x = 30,936,544.33
5. Step 5: Solve for x
   x = 30,936,544.33/5,238.47
6. Step 6: Final answer
   x = 5,905.64