Finding the Fourth Proportional to 2,618.82, 3,613.98 and 1,439.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.82 : 3,613.98 = 1,439.96 : x
2. Step 2: Convert to fraction form
   2,618.82/3,613.98 = 1,439.96/x
3. Step 3: Cross multiply
   2,618.82x = 3,613.98 × 1,439.96
4. Step 4: Simplify right side
   2,618.82x = 5,203,995.68
5. Step 5: Solve for x
   x = 5,203,995.68/2,618.82
6. Step 6: Final answer
   x = 1,987.16