Finding the Fourth Proportional to 2,622.85, 3,934.37 and 867.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.85 : 3,934.37 = 867.89 : x
2. Step 2: Convert to fraction form
   2,622.85/3,934.37 = 867.89/x
3. Step 3: Cross multiply
   2,622.85x = 3,934.37 × 867.89
4. Step 4: Simplify right side
   2,622.85x = 3,414,600.38
5. Step 5: Solve for x
   x = 3,414,600.38/2,622.85
6. Step 6: Final answer
   x = 1,301.87