Finding the Fourth Proportional to 3,911.52, 5,396.54 and 2,231.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,911.52 : 5,396.54 = 2,231.71 : x
2. Step 2: Convert to fraction form
   3,911.52/5,396.54 = 2,231.71/x
3. Step 3: Cross multiply
   3,911.52x = 5,396.54 × 2,231.71
4. Step 4: Simplify right side
   3,911.52x = 12,043,512.28
5. Step 5: Solve for x
   x = 12,043,512.28/3,911.52
6. Step 6: Final answer
   x = 3,078.99