Finding the Fourth Proportional to 1,082.34, 1,493.86 and 689.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.34 : 1,493.86 = 689.28 : x
2. Step 2: Convert to fraction form
   1,082.34/1,493.86 = 689.28/x
3. Step 3: Cross multiply
   1,082.34x = 1,493.86 × 689.28
4. Step 4: Simplify right side
   1,082.34x = 1,029,687.82
5. Step 5: Solve for x
   x = 1,029,687.82/1,082.34
6. Step 6: Final answer
   x = 951.35