Finding the Fourth Proportional to 2,618.61, 3,613.54 and 1,439.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.61 : 3,613.54 = 1,439.45 : x
2. Step 2: Convert to fraction form
   2,618.61/3,613.54 = 1,439.45/x
3. Step 3: Cross multiply
   2,618.61x = 3,613.54 × 1,439.45
4. Step 4: Simplify right side
   2,618.61x = 5,201,510.15
5. Step 5: Solve for x
   x = 5,201,510.15/2,618.61
6. Step 6: Final answer
   x = 1,986.36