Finding the Fourth Proportional to 111.72, 167.64 and 43.29

Step by Step Solution

1. Step 1: Write the proportion equation
   111.72 : 167.64 = 43.29 : x
2. Step 2: Convert to fraction form
   111.72/167.64 = 43.29/x
3. Step 3: Cross multiply
   111.72x = 167.64 × 43.29
4. Step 4: Simplify right side
   111.72x = 7,257.14
5. Step 5: Solve for x
   x = 7,257.14/111.72
6. Step 6: Final answer
   x = 64.96