Finding the Fourth Proportional to 1,279.38, 1,920.61 and 867.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.38 : 1,920.61 = 867.27 : x
2. Step 2: Convert to fraction form
   1,279.38/1,920.61 = 867.27/x
3. Step 3: Cross multiply
   1,279.38x = 1,920.61 × 867.27
4. Step 4: Simplify right side
   1,279.38x = 1,665,685.27
5. Step 5: Solve for x
   x = 1,665,685.27/1,279.38
6. Step 6: Final answer
   x = 1,301.94