Finding the Fourth Proportional to 1,728.31, 2,384.96 and 1,020.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.31 : 2,384.96 = 1,020.18 : x
2. Step 2: Convert to fraction form
   1,728.31/2,384.96 = 1,020.18/x
3. Step 3: Cross multiply
   1,728.31x = 2,384.96 × 1,020.18
4. Step 4: Simplify right side
   1,728.31x = 2,433,088.49
5. Step 5: Solve for x
   x = 2,433,088.49/1,728.31
6. Step 6: Final answer
   x = 1,407.78