Finding the Fourth Proportional to 1,793.59, 2,686.49 and 867.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,793.59 : 2,686.49 = 867.20 : x
2. Step 2: Convert to fraction form
   1,793.59/2,686.49 = 867.20/x
3. Step 3: Cross multiply
   1,793.59x = 2,686.49 × 867.20
4. Step 4: Simplify right side
   1,793.59x = 2,329,724.72
5. Step 5: Solve for x
   x = 2,329,724.72/1,793.59
6. Step 6: Final answer
   x = 1,298.91