Finding the Fourth Proportional to 3,959.20, 5,461.98 and 2,386.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.20 : 5,461.98 = 2,386.39 : x
2. Step 2: Convert to fraction form
   3,959.20/5,461.98 = 2,386.39/x
3. Step 3: Cross multiply
   3,959.20x = 5,461.98 × 2,386.39
4. Step 4: Simplify right side
   3,959.20x = 13,034,414.45
5. Step 5: Solve for x
   x = 13,034,414.45/3,959.20
6. Step 6: Final answer
   x = 3,292.18