Finding the Fourth Proportional to 3,979.90, 5,957.70 and 3,105.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.90 : 5,957.70 = 3,105.10 : x
2. Step 2: Convert to fraction form
   3,979.90/5,957.70 = 3,105.10/x
3. Step 3: Cross multiply
   3,979.90x = 5,957.70 × 3,105.10
4. Step 4: Simplify right side
   3,979.90x = 18,499,254.27
5. Step 5: Solve for x
   x = 18,499,254.27/3,979.90
6. Step 6: Final answer
   x = 4,648.17