Finding the Fourth Proportional to 3,959.72, 5,464.17 and 2,191.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.72 : 5,464.17 = 2,191.22 : x
2. Step 2: Convert to fraction form
   3,959.72/5,464.17 = 2,191.22/x
3. Step 3: Cross multiply
   3,959.72x = 5,464.17 × 2,191.22
4. Step 4: Simplify right side
   3,959.72x = 11,973,171.27
5. Step 5: Solve for x
   x = 11,973,171.27/3,959.72
6. Step 6: Final answer
   x = 3,023.75