Finding the Fourth Proportional to 2,671.43, 4,009.59 and 1,440.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.43 : 4,009.59 = 1,440.05 : x
2. Step 2: Convert to fraction form
   2,671.43/4,009.59 = 1,440.05/x
3. Step 3: Cross multiply
   2,671.43x = 4,009.59 × 1,440.05
4. Step 4: Simplify right side
   2,671.43x = 5,773,990.03
5. Step 5: Solve for x
   x = 5,773,990.03/2,671.43
6. Step 6: Final answer
   x = 2,161.39