Finding the Fourth Proportional to 1,728.72, 2,384.66 and 1,065.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.72 : 2,384.66 = 1,065.10 : x
2. Step 2: Convert to fraction form
   1,728.72/2,384.66 = 1,065.10/x
3. Step 3: Cross multiply
   1,728.72x = 2,384.66 × 1,065.10
4. Step 4: Simplify right side
   1,728.72x = 2,539,901.37
5. Step 5: Solve for x
   x = 2,539,901.37/1,728.72
6. Step 6: Final answer
   x = 1,469.24