Finding the Fourth Proportional to 2,671.52, 4,007.82 and 1,439.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.52 : 4,007.82 = 1,439.60 : x
2. Step 2: Convert to fraction form
   2,671.52/4,007.82 = 1,439.60/x
3. Step 3: Cross multiply
   2,671.52x = 4,007.82 × 1,439.60
4. Step 4: Simplify right side
   2,671.52x = 5,769,657.67
5. Step 5: Solve for x
   x = 5,769,657.67/2,671.52
6. Step 6: Final answer
   x = 2,159.69