Finding the Fourth Proportional to 744.73, 1,111.67 and 689.83

Step by Step Solution

1. Step 1: Write the proportion equation
   744.73 : 1,111.67 = 689.83 : x
2. Step 2: Convert to fraction form
   744.73/1,111.67 = 689.83/x
3. Step 3: Cross multiply
   744.73x = 1,111.67 × 689.83
4. Step 4: Simplify right side
   744.73x = 766,863.32
5. Step 5: Solve for x
   x = 766,863.32/744.73
6. Step 6: Final answer
   x = 1,029.72