Finding the Fourth Proportional to 2,618.46, 3,613.34 and 1,439.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.46 : 3,613.34 = 1,439.58 : x
2. Step 2: Convert to fraction form
   2,618.46/3,613.34 = 1,439.58/x
3. Step 3: Cross multiply
   2,618.46x = 3,613.34 × 1,439.58
4. Step 4: Simplify right side
   2,618.46x = 5,201,692.00
5. Step 5: Solve for x
   x = 5,201,692.00/2,618.46
6. Step 6: Final answer
   x = 1,986.55