Finding the Fourth Proportional to 2,618.02, 3,612.88 and 1,439.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.02 : 3,612.88 = 1,439.17 : x
2. Step 2: Convert to fraction form
   2,618.02/3,612.88 = 1,439.17/x
3. Step 3: Cross multiply
   2,618.02x = 3,612.88 × 1,439.17
4. Step 4: Simplify right side
   2,618.02x = 5,199,533.16
5. Step 5: Solve for x
   x = 5,199,533.16/2,618.02
6. Step 6: Final answer
   x = 1,986.06