Finding the Fourth Proportional to 4,939.40, 7,414.89 and 3,900.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,939.40 : 7,414.89 = 3,900.10 : x
2. Step 2: Convert to fraction form
   4,939.40/7,414.89 = 3,900.10/x
3. Step 3: Cross multiply
   4,939.40x = 7,414.89 × 3,900.10
4. Step 4: Simplify right side
   4,939.40x = 28,918,821.28
5. Step 5: Solve for x
   x = 28,918,821.28/4,939.40
6. Step 6: Final answer
   x = 5,854.72