Finding the Fourth Proportional to 2,100.24, 3,151.17 and 868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.24 : 3,151.17 = 868.50 : x
2. Step 2: Convert to fraction form
   2,100.24/3,151.17 = 868.50/x
3. Step 3: Cross multiply
   2,100.24x = 3,151.17 × 868.50
4. Step 4: Simplify right side
   2,100.24x = 2,736,791.15
5. Step 5: Solve for x
   x = 2,736,791.15/2,100.24
6. Step 6: Final answer
   x = 1,303.08