Finding the Fourth Proportional to 111.56, 167.34 and 43.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111.56 : 167.34 = 43.12 : x
2. Step 2: Convert to fraction form
   111.56/167.34 = 43.12/x
3. Step 3: Cross multiply
   111.56x = 167.34 × 43.12
4. Step 4: Simplify right side
   111.56x = 7,215.70
5. Step 5: Solve for x
   x = 7,215.70/111.56
6. Step 6: Final answer
   x = 64.68