Finding the Fourth Proportional to 1,728.52, 2,385.98 and 1,170.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.52 : 2,385.98 = 1,170.22 : x
2. Step 2: Convert to fraction form
   1,728.52/2,385.98 = 1,170.22/x
3. Step 3: Cross multiply
   1,728.52x = 2,385.98 × 1,170.22
4. Step 4: Simplify right side
   1,728.52x = 2,792,121.52
5. Step 5: Solve for x
   x = 2,792,121.52/1,728.52
6. Step 6: Final answer
   x = 1,615.32