Finding the Fourth Proportional to 111.67, 167.42 and 43.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111.67 : 167.42 = 43.18 : x
2. Step 2: Convert to fraction form
   111.67/167.42 = 43.18/x
3. Step 3: Cross multiply
   111.67x = 167.42 × 43.18
4. Step 4: Simplify right side
   111.67x = 7,228.98
5. Step 5: Solve for x
   x = 7,228.98/111.67
6. Step 6: Final answer
   x = 64.74