Finding the Fourth Proportional to 2,404.36, 3,605.82 and 865

Step by Step Solution

1. Step 1: Write the proportion equation
   2,404.36 : 3,605.82 = 865 : x
2. Step 2: Convert to fraction form
   2,404.36/3,605.82 = 865/x
3. Step 3: Cross multiply
   2,404.36x = 3,605.82 × 865
4. Step 4: Simplify right side
   2,404.36x = 3,119,034.30
5. Step 5: Solve for x
   x = 3,119,034.30/2,404.36
6. Step 6: Final answer
   x = 1,297.24