Finding the Fourth Proportional to 1,105.42, 1,658.28 and 528.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.42 : 1,658.28 = 528.28 : x
2. Step 2: Convert to fraction form
   1,105.42/1,658.28 = 528.28/x
3. Step 3: Cross multiply
   1,105.42x = 1,658.28 × 528.28
4. Step 4: Simplify right side
   1,105.42x = 876,036.16
5. Step 5: Solve for x
   x = 876,036.16/1,105.42
6. Step 6: Final answer
   x = 792.49