Finding the Fourth Proportional to 3,959.91, 5,966.27 and 3,585.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.91 : 5,966.27 = 3,585.12 : x
2. Step 2: Convert to fraction form
   3,959.91/5,966.27 = 3,585.12/x
3. Step 3: Cross multiply
   3,959.91x = 5,966.27 × 3,585.12
4. Step 4: Simplify right side
   3,959.91x = 21,389,775.98
5. Step 5: Solve for x
   x = 21,389,775.98/3,959.91
6. Step 6: Final answer
   x = 5,401.58