Finding the Fourth Proportional to 2,180.59, 3,007.69 and 1,434.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.59 : 3,007.69 = 1,434.31 : x
2. Step 2: Convert to fraction form
   2,180.59/3,007.69 = 1,434.31/x
3. Step 3: Cross multiply
   2,180.59x = 3,007.69 × 1,434.31
4. Step 4: Simplify right side
   2,180.59x = 4,313,965.40
5. Step 5: Solve for x
   x = 4,313,965.40/2,180.59
6. Step 6: Final answer
   x = 1,978.35