Finding the Fourth Proportional to 1,105.42, 1,658.76 and 528.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.42 : 1,658.76 = 528.34 : x
2. Step 2: Convert to fraction form
   1,105.42/1,658.76 = 528.34/x
3. Step 3: Cross multiply
   1,105.42x = 1,658.76 × 528.34
4. Step 4: Simplify right side
   1,105.42x = 876,389.26
5. Step 5: Solve for x
   x = 876,389.26/1,105.42
6. Step 6: Final answer
   x = 792.81