Finding the Fourth Proportional to 1,081.93, 1,493.56 and 689.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.93 : 1,493.56 = 689.49 : x
2. Step 2: Convert to fraction form
   1,081.93/1,493.56 = 689.49/x
3. Step 3: Cross multiply
   1,081.93x = 1,493.56 × 689.49
4. Step 4: Simplify right side
   1,081.93x = 1,029,787.22
5. Step 5: Solve for x
   x = 1,029,787.22/1,081.93
6. Step 6: Final answer
   x = 951.81