Finding the Fourth Proportional to 3,958.56, 5,908.98 and 3,665.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.56 : 5,908.98 = 3,665.76 : x
2. Step 2: Convert to fraction form
   3,958.56/5,908.98 = 3,665.76/x
3. Step 3: Cross multiply
   3,958.56x = 5,908.98 × 3,665.76
4. Step 4: Simplify right side
   3,958.56x = 21,660,902.52
5. Step 5: Solve for x
   x = 21,660,902.52/3,958.56
6. Step 6: Final answer
   x = 5,471.91