Finding the Fourth Proportional to 3,939.09, 5,879.81 and 3,472.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.09 : 5,879.81 = 3,472.03 : x
2. Step 2: Convert to fraction form
   3,939.09/5,879.81 = 3,472.03/x
3. Step 3: Cross multiply
   3,939.09x = 5,879.81 × 3,472.03
4. Step 4: Simplify right side
   3,939.09x = 20,414,847.32
5. Step 5: Solve for x
   x = 20,414,847.32/3,939.09
6. Step 6: Final answer
   x = 5,182.63