Finding the Fourth Proportional to 111.48, 166.32 and 109.32

Step by Step Solution

1. Step 1: Write the proportion equation
   111.48 : 166.32 = 109.32 : x
2. Step 2: Convert to fraction form
   111.48/166.32 = 109.32/x
3. Step 3: Cross multiply
   111.48x = 166.32 × 109.32
4. Step 4: Simplify right side
   111.48x = 18,182.10
5. Step 5: Solve for x
   x = 18,182.10/111.48
6. Step 6: Final answer
   x = 163.10