Finding the Fourth Proportional to 111.79, 167.59 and 43.31

Step by Step Solution

1. Step 1: Write the proportion equation
   111.79 : 167.59 = 43.31 : x
2. Step 2: Convert to fraction form
   111.79/167.59 = 43.31/x
3. Step 3: Cross multiply
   111.79x = 167.59 × 43.31
4. Step 4: Simplify right side
   111.79x = 7,258.32
5. Step 5: Solve for x
   x = 7,258.32/111.79
6. Step 6: Final answer
   x = 64.93