Finding the Fourth Proportional to 2,618.23, 3,613.00 and 1,439.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.23 : 3,613.00 = 1,439.30 : x
2. Step 2: Convert to fraction form
   2,618.23/3,613.00 = 1,439.30/x
3. Step 3: Cross multiply
   2,618.23x = 3,613.00 × 1,439.30
4. Step 4: Simplify right side
   2,618.23x = 5,200,196.33
5. Step 5: Solve for x
   x = 5,200,196.33/2,618.23
6. Step 6: Final answer
   x = 1,986.15