Finding the Fourth Proportional to 2,405.33, 3,605.83 and 865.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.33 : 3,605.83 = 865.97 : x
2. Step 2: Convert to fraction form
   2,405.33/3,605.83 = 865.97/x
3. Step 3: Cross multiply
   2,405.33x = 3,605.83 × 865.97
4. Step 4: Simplify right side
   2,405.33x = 3,122,540.61
5. Step 5: Solve for x
   x = 3,122,540.61/2,405.33
6. Step 6: Final answer
   x = 1,298.18