Finding the Fourth Proportional to 2,101.28, 3,152.09 and 868.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.28 : 3,152.09 = 868.46 : x
2. Step 2: Convert to fraction form
   2,101.28/3,152.09 = 868.46/x
3. Step 3: Cross multiply
   2,101.28x = 3,152.09 × 868.46
4. Step 4: Simplify right side
   2,101.28x = 2,737,443.98
5. Step 5: Solve for x
   x = 2,737,443.98/2,101.28
6. Step 6: Final answer
   x = 1,302.75