Finding the Fourth Proportional to 1,728.43, 2,386.28 and 1,168.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.43 : 2,386.28 = 1,168.99 : x
2. Step 2: Convert to fraction form
   1,728.43/2,386.28 = 1,168.99/x
3. Step 3: Cross multiply
   1,728.43x = 2,386.28 × 1,168.99
4. Step 4: Simplify right side
   1,728.43x = 2,789,530.03
5. Step 5: Solve for x
   x = 2,789,530.03/1,728.43
6. Step 6: Final answer
   x = 1,613.91