Finding the Fourth Proportional to 2,100.99, 3,149.15 and 868.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.99 : 3,149.15 = 868.07 : x
2. Step 2: Convert to fraction form
   2,100.99/3,149.15 = 868.07/x
3. Step 3: Cross multiply
   2,100.99x = 3,149.15 × 868.07
4. Step 4: Simplify right side
   2,100.99x = 2,733,668.46
5. Step 5: Solve for x
   x = 2,733,668.46/2,100.99
6. Step 6: Final answer
   x = 1,301.13