Finding the Fourth Proportional to 111.06, 166.59 and 108.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111.06 : 166.59 = 108.18 : x
2. Step 2: Convert to fraction form
   111.06/166.59 = 108.18/x
3. Step 3: Cross multiply
   111.06x = 166.59 × 108.18
4. Step 4: Simplify right side
   111.06x = 18,021.71
5. Step 5: Solve for x
   x = 18,021.71/111.06
6. Step 6: Final answer
   x = 162.27