Finding the Fourth Proportional to 2,101.94, 3,151.12 and 868.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.94 : 3,151.12 = 868.58 : x
2. Step 2: Convert to fraction form
   2,101.94/3,151.12 = 868.58/x
3. Step 3: Cross multiply
   2,101.94x = 3,151.12 × 868.58
4. Step 4: Simplify right side
   2,101.94x = 2,736,999.81
5. Step 5: Solve for x
   x = 2,736,999.81/2,101.94
6. Step 6: Final answer
   x = 1,302.13