Finding the Fourth Proportional to 5,740.86, 7,908.39 and 3,969.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,740.86 : 7,908.39 = 3,969.42 : x
2. Step 2: Convert to fraction form
   5,740.86/7,908.39 = 3,969.42/x
3. Step 3: Cross multiply
   5,740.86x = 7,908.39 × 3,969.42
4. Step 4: Simplify right side
   5,740.86x = 31,391,721.43
5. Step 5: Solve for x
   x = 31,391,721.43/5,740.86
6. Step 6: Final answer
   x = 5,468.12