Finding the Fourth Proportional to 3,959.47, 5,461.59 and 3,119.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.47 : 5,461.59 = 3,119.30 : x
2. Step 2: Convert to fraction form
   3,959.47/5,461.59 = 3,119.30/x
3. Step 3: Cross multiply
   3,959.47x = 5,461.59 × 3,119.30
4. Step 4: Simplify right side
   3,959.47x = 17,036,337.69
5. Step 5: Solve for x
   x = 17,036,337.69/3,959.47
6. Step 6: Final answer
   x = 4,302.68