Finding the Fourth Proportional to 1,728.03, 2,384.59 and 1,055.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.03 : 2,384.59 = 1,055.70 : x
2. Step 2: Convert to fraction form
   1,728.03/2,384.59 = 1,055.70/x
3. Step 3: Cross multiply
   1,728.03x = 2,384.59 × 1,055.70
4. Step 4: Simplify right side
   1,728.03x = 2,517,421.83
5. Step 5: Solve for x
   x = 2,517,421.83/1,728.03
6. Step 6: Final answer
   x = 1,456.82