Finding the Fourth Proportional to 1,108.48, 1,529.82 and 689.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.48 : 1,529.82 = 689.10 : x
2. Step 2: Convert to fraction form
   1,108.48/1,529.82 = 689.10/x
3. Step 3: Cross multiply
   1,108.48x = 1,529.82 × 689.10
4. Step 4: Simplify right side
   1,108.48x = 1,054,198.96
5. Step 5: Solve for x
   x = 1,054,198.96/1,108.48
6. Step 6: Final answer
   x = 951.03