Finding the Fourth Proportional to 1,728.61, 2,384.71 and 1,065.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.61 : 2,384.71 = 1,065.22 : x
2. Step 2: Convert to fraction form
   1,728.61/2,384.71 = 1,065.22/x
3. Step 3: Cross multiply
   1,728.61x = 2,384.71 × 1,065.22
4. Step 4: Simplify right side
   1,728.61x = 2,540,240.79
5. Step 5: Solve for x
   x = 2,540,240.79/1,728.61
6. Step 6: Final answer
   x = 1,469.53