Finding the Fourth Proportional to 5,108.56, 7,669.41 and 3,939.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,108.56 : 7,669.41 = 3,939.31 : x
2. Step 2: Convert to fraction form
   5,108.56/7,669.41 = 3,939.31/x
3. Step 3: Cross multiply
   5,108.56x = 7,669.41 × 3,939.31
4. Step 4: Simplify right side
   5,108.56x = 30,212,183.51
5. Step 5: Solve for x
   x = 30,212,183.51/5,108.56
6. Step 6: Final answer
   x = 5,914.03