Finding the Fourth Proportional to 3,959.57, 5,940.74 and 2,648.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.57 : 5,940.74 = 2,648.59 : x
2. Step 2: Convert to fraction form
   3,959.57/5,940.74 = 2,648.59/x
3. Step 3: Cross multiply
   3,959.57x = 5,940.74 × 2,648.59
4. Step 4: Simplify right side
   3,959.57x = 15,734,576.33
5. Step 5: Solve for x
   x = 15,734,576.33/3,959.57
6. Step 6: Final answer
   x = 3,973.81