Finding the Fourth Proportional to 2,738.07, 4,108.73 and 1,439.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.07 : 4,108.73 = 1,439.64 : x
2. Step 2: Convert to fraction form
   2,738.07/4,108.73 = 1,439.64/x
3. Step 3: Cross multiply
   2,738.07x = 4,108.73 × 1,439.64
4. Step 4: Simplify right side
   2,738.07x = 5,915,084.86
5. Step 5: Solve for x
   x = 5,915,084.86/2,738.07
6. Step 6: Final answer
   x = 2,160.31