Finding the Fourth Proportional to 2,617.33, 3,926.57 and 862.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.33 : 3,926.57 = 862.87 : x
2. Step 2: Convert to fraction form
   2,617.33/3,926.57 = 862.87/x
3. Step 3: Cross multiply
   2,617.33x = 3,926.57 × 862.87
4. Step 4: Simplify right side
   2,617.33x = 3,388,119.46
5. Step 5: Solve for x
   x = 3,388,119.46/2,617.33
6. Step 6: Final answer
   x = 1,294.49