Finding the Fourth Proportional to 2,724.78, 4,080.78 and 1,339.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,724.78 : 4,080.78 = 1,339.05 : x
2. Step 2: Convert to fraction form
   2,724.78/4,080.78 = 1,339.05/x
3. Step 3: Cross multiply
   2,724.78x = 4,080.78 × 1,339.05
4. Step 4: Simplify right side
   2,724.78x = 5,464,368.46
5. Step 5: Solve for x
   x = 5,464,368.46/2,724.78
6. Step 6: Final answer
   x = 2,005.43