Finding the Fourth Proportional to 2,618.73, 3,613.71 and 1,439.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.73 : 3,613.71 = 1,439.57 : x
2. Step 2: Convert to fraction form
   2,618.73/3,613.71 = 1,439.57/x
3. Step 3: Cross multiply
   2,618.73x = 3,613.71 × 1,439.57
4. Step 4: Simplify right side
   2,618.73x = 5,202,202.94
5. Step 5: Solve for x
   x = 5,202,202.94/2,618.73
6. Step 6: Final answer
   x = 1,986.54