Finding the Fourth Proportional to 2,671.89, 4,009.35 and 1,439.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.89 : 4,009.35 = 1,439.27 : x
2. Step 2: Convert to fraction form
   2,671.89/4,009.35 = 1,439.27/x
3. Step 3: Cross multiply
   2,671.89x = 4,009.35 × 1,439.27
4. Step 4: Simplify right side
   2,671.89x = 5,770,529.98
5. Step 5: Solve for x
   x = 5,770,529.98/2,671.89
6. Step 6: Final answer
   x = 2,159.72