Finding the Fourth Proportional to 111.52, 167.31 and 43.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111.52 : 167.31 = 43.05 : x
2. Step 2: Convert to fraction form
   111.52/167.31 = 43.05/x
3. Step 3: Cross multiply
   111.52x = 167.31 × 43.05
4. Step 4: Simplify right side
   111.52x = 7,202.70
5. Step 5: Solve for x
   x = 7,202.70/111.52
6. Step 6: Final answer
   x = 64.59