Finding the Fourth Proportional to 111.71, 166.72 and 108.83

Step by Step Solution

1. Step 1: Write the proportion equation
   111.71 : 166.72 = 108.83 : x
2. Step 2: Convert to fraction form
   111.71/166.72 = 108.83/x
3. Step 3: Cross multiply
   111.71x = 166.72 × 108.83
4. Step 4: Simplify right side
   111.71x = 18,144.14
5. Step 5: Solve for x
   x = 18,144.14/111.71
6. Step 6: Final answer
   x = 162.42