Finding the Fourth Proportional to 111.71, 167.51 and 43.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111.71 : 167.51 = 43.23 : x
2. Step 2: Convert to fraction form
   111.71/167.51 = 43.23/x
3. Step 3: Cross multiply
   111.71x = 167.51 × 43.23
4. Step 4: Simplify right side
   111.71x = 7,241.46
5. Step 5: Solve for x
   x = 7,241.46/111.71
6. Step 6: Final answer
   x = 64.82