Finding the Fourth Proportional to 111.36, 166.98 and 65.09

Step by Step Solution

1. Step 1: Write the proportion equation
   111.36 : 166.98 = 65.09 : x
2. Step 2: Convert to fraction form
   111.36/166.98 = 65.09/x
3. Step 3: Cross multiply
   111.36x = 166.98 × 65.09
4. Step 4: Simplify right side
   111.36x = 10,867.89
5. Step 5: Solve for x
   x = 10,867.89/111.36
6. Step 6: Final answer
   x = 97.59