Finding the Fourth Proportional to 111.83, 167.98 and 108.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111.83 : 167.98 = 108.18 : x
2. Step 2: Convert to fraction form
   111.83/167.98 = 108.18/x
3. Step 3: Cross multiply
   111.83x = 167.98 × 108.18
4. Step 4: Simplify right side
   111.83x = 18,171.81
5. Step 5: Solve for x
   x = 18,171.81/111.83
6. Step 6: Final answer
   x = 162.50