Finding the Fourth Proportional to 134.78, 185.69 and 111.33

Step by Step Solution

1. Step 1: Write the proportion equation
   134.78 : 185.69 = 111.33 : x
2. Step 2: Convert to fraction form
   134.78/185.69 = 111.33/x
3. Step 3: Cross multiply
   134.78x = 185.69 × 111.33
4. Step 4: Simplify right side
   134.78x = 20,673.15
5. Step 5: Solve for x
   x = 20,673.15/134.78
6. Step 6: Final answer
   x = 153.39