Finding the Fourth Proportional to 3,910.17, 5,395.63 and 2,231.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.17 : 5,395.63 = 2,231.42 : x
2. Step 2: Convert to fraction form
   3,910.17/5,395.63 = 2,231.42/x
3. Step 3: Cross multiply
   3,910.17x = 5,395.63 × 2,231.42
4. Step 4: Simplify right side
   3,910.17x = 12,039,924.43
5. Step 5: Solve for x
   x = 12,039,924.43/3,910.17
6. Step 6: Final answer
   x = 3,079.13