Finding the Fourth Proportional to 111.93, 167.69 and 109.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111.93 : 167.69 = 109.10 : x
2. Step 2: Convert to fraction form
   111.93/167.69 = 109.10/x
3. Step 3: Cross multiply
   111.93x = 167.69 × 109.10
4. Step 4: Simplify right side
   111.93x = 18,293.60
5. Step 5: Solve for x
   x = 18,293.60/111.93
6. Step 6: Final answer
   x = 163.44