Finding the Fourth Proportional to 3,959.59, 5,464.15 and 2,191.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.59 : 5,464.15 = 2,191.15 : x
2. Step 2: Convert to fraction form
   3,959.59/5,464.15 = 2,191.15/x
3. Step 3: Cross multiply
   3,959.59x = 5,464.15 × 2,191.15
4. Step 4: Simplify right side
   3,959.59x = 11,972,772.27
5. Step 5: Solve for x
   x = 11,972,772.27/3,959.59
6. Step 6: Final answer
   x = 3,023.74