Finding the Fourth Proportional to 1,728.43, 2,385.27 and 1,065.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.43 : 2,385.27 = 1,065.71 : x
2. Step 2: Convert to fraction form
   1,728.43/2,385.27 = 1,065.71/x
3. Step 3: Cross multiply
   1,728.43x = 2,385.27 × 1,065.71
4. Step 4: Simplify right side
   1,728.43x = 2,542,006.09
5. Step 5: Solve for x
   x = 2,542,006.09/1,728.43
6. Step 6: Final answer
   x = 1,470.71