Finding the Fourth Proportional to 111.33, 153.50 and 107.55

Step by Step Solution

1. Step 1: Write the proportion equation
   111.33 : 153.50 = 107.55 : x
2. Step 2: Convert to fraction form
   111.33/153.50 = 107.55/x
3. Step 3: Cross multiply
   111.33x = 153.50 × 107.55
4. Step 4: Simplify right side
   111.33x = 16,508.39
5. Step 5: Solve for x
   x = 16,508.39/111.33
6. Step 6: Final answer
   x = 148.28