Finding the Fourth Proportional to 111.43, 167.15 and 65.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111.43 : 167.15 = 65.12 : x
2. Step 2: Convert to fraction form
   111.43/167.15 = 65.12/x
3. Step 3: Cross multiply
   111.43x = 167.15 × 65.12
4. Step 4: Simplify right side
   111.43x = 10,885.43
5. Step 5: Solve for x
   x = 10,885.43/111.43
6. Step 6: Final answer
   x = 97.69