Finding the Fourth Proportional to 111.71, 167.47 and 43.28

Step by Step Solution

1. Step 1: Write the proportion equation
   111.71 : 167.47 = 43.28 : x
2. Step 2: Convert to fraction form
   111.71/167.47 = 43.28/x
3. Step 3: Cross multiply
   111.71x = 167.47 × 43.28
4. Step 4: Simplify right side
   111.71x = 7,247.89
5. Step 5: Solve for x
   x = 7,247.89/111.71
6. Step 6: Final answer
   x = 64.88