Finding the Fourth Proportional to 2,102.05, 3,150.76 and 868.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.05 : 3,150.76 = 868.79 : x
2. Step 2: Convert to fraction form
   2,102.05/3,150.76 = 868.79/x
3. Step 3: Cross multiply
   2,102.05x = 3,150.76 × 868.79
4. Step 4: Simplify right side
   2,102.05x = 2,737,348.78
5. Step 5: Solve for x
   x = 2,737,348.78/2,102.05
6. Step 6: Final answer
   x = 1,302.23