Finding the Fourth Proportional to 1,105.48, 1,524.78 and 938.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.48 : 1,524.78 = 938.54 : x
2. Step 2: Convert to fraction form
   1,105.48/1,524.78 = 938.54/x
3. Step 3: Cross multiply
   1,105.48x = 1,524.78 × 938.54
4. Step 4: Simplify right side
   1,105.48x = 1,431,065.12
5. Step 5: Solve for x
   x = 1,431,065.12/1,105.48
6. Step 6: Final answer
   x = 1,294.52