Finding the Fourth Proportional to 3,979.30, 5,491.46 and 2,407.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.30 : 5,491.46 = 2,407.08 : x
2. Step 2: Convert to fraction form
   3,979.30/5,491.46 = 2,407.08/x
3. Step 3: Cross multiply
   3,979.30x = 5,491.46 × 2,407.08
4. Step 4: Simplify right side
   3,979.30x = 13,218,383.54
5. Step 5: Solve for x
   x = 13,218,383.54/3,979.30
6. Step 6: Final answer
   x = 3,321.79