Finding the Fourth Proportional to 111.28, 166 and 103.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.28 : 166 = 103.52 : x
2. Step 2: Convert to fraction form
   111.28/166 = 103.52/x
3. Step 3: Cross multiply
   111.28x = 166 × 103.52
4. Step 4: Simplify right side
   111.28x = 17,184.32
5. Step 5: Solve for x
   x = 17,184.32/111.28
6. Step 6: Final answer
   x = 154.42