Finding the Fourth Proportional to 1,383.23, 2,073.47 and 688.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.23 : 2,073.47 = 688.83 : x
2. Step 2: Convert to fraction form
   1,383.23/2,073.47 = 688.83/x
3. Step 3: Cross multiply
   1,383.23x = 2,073.47 × 688.83
4. Step 4: Simplify right side
   1,383.23x = 1,428,264.90
5. Step 5: Solve for x
   x = 1,428,264.90/1,383.23
6. Step 6: Final answer
   x = 1,032.56