Finding the Fourth Proportional to 2,951.18, 4,426.81 and 871.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,951.18 : 4,426.81 = 871.23 : x
2. Step 2: Convert to fraction form
   2,951.18/4,426.81 = 871.23/x
3. Step 3: Cross multiply
   2,951.18x = 4,426.81 × 871.23
4. Step 4: Simplify right side
   2,951.18x = 3,856,767.50
5. Step 5: Solve for x
   x = 3,856,767.50/2,951.18
6. Step 6: Final answer
   x = 1,306.86