Finding the Fourth Proportional to 2,100.86, 3,152.70 and 868.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.86 : 3,152.70 = 868.25 : x
2. Step 2: Convert to fraction form
   2,100.86/3,152.70 = 868.25/x
3. Step 3: Cross multiply
   2,100.86x = 3,152.70 × 868.25
4. Step 4: Simplify right side
   2,100.86x = 2,737,316.01
5. Step 5: Solve for x
   x = 2,737,316.01/2,100.86
6. Step 6: Final answer
   x = 1,302.95