Finding the Fourth Proportional to 1,550.29, 2,139.37 and 868.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.29 : 2,139.37 = 868.92 : x
2. Step 2: Convert to fraction form
   1,550.29/2,139.37 = 868.92/x
3. Step 3: Cross multiply
   1,550.29x = 2,139.37 × 868.92
4. Step 4: Simplify right side
   1,550.29x = 1,858,941.38
5. Step 5: Solve for x
   x = 1,858,941.38/1,550.29
6. Step 6: Final answer
   x = 1,199.10