Finding the Fourth Proportional to 3,910.88, 5,397.52 and 2,231.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.88 : 5,397.52 = 2,231.90 : x
2. Step 2: Convert to fraction form
   3,910.88/5,397.52 = 2,231.90/x
3. Step 3: Cross multiply
   3,910.88x = 5,397.52 × 2,231.90
4. Step 4: Simplify right side
   3,910.88x = 12,046,724.89
5. Step 5: Solve for x
   x = 12,046,724.89/3,910.88
6. Step 6: Final answer
   x = 3,080.31