Finding the Fourth Proportional to 111.75, 167.49 and 43.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111.75 : 167.49 = 43.23 : x
2. Step 2: Convert to fraction form
   111.75/167.49 = 43.23/x
3. Step 3: Cross multiply
   111.75x = 167.49 × 43.23
4. Step 4: Simplify right side
   111.75x = 7,241.34
5. Step 5: Solve for x
   x = 7,241.34/111.75
6. Step 6: Final answer
   x = 64.80