Finding the Fourth Proportional to 3,958.38, 5,908.70 and 3,665.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.38 : 5,908.70 = 3,665.16 : x
2. Step 2: Convert to fraction form
   3,958.38/5,908.70 = 3,665.16/x
3. Step 3: Cross multiply
   3,958.38x = 5,908.70 × 3,665.16
4. Step 4: Simplify right side
   3,958.38x = 21,656,340.05
5. Step 5: Solve for x
   x = 21,656,340.05/3,958.38
6. Step 6: Final answer
   x = 5,471.01