Finding the Fourth Proportional to 1,108.82, 1,529.76 and 689.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.82 : 1,529.76 = 689.52 : x
2. Step 2: Convert to fraction form
   1,108.82/1,529.76 = 689.52/x
3. Step 3: Cross multiply
   1,108.82x = 1,529.76 × 689.52
4. Step 4: Simplify right side
   1,108.82x = 1,054,800.12
5. Step 5: Solve for x
   x = 1,054,800.12/1,108.82
6. Step 6: Final answer
   x = 951.28