Finding the Fourth Proportional to 111.76, 167.58 and 43.31

Step by Step Solution

1. Step 1: Write the proportion equation
   111.76 : 167.58 = 43.31 : x
2. Step 2: Convert to fraction form
   111.76/167.58 = 43.31/x
3. Step 3: Cross multiply
   111.76x = 167.58 × 43.31
4. Step 4: Simplify right side
   111.76x = 7,257.89
5. Step 5: Solve for x
   x = 7,257.89/111.76
6. Step 6: Final answer
   x = 64.94