Finding the Fourth Proportional to 111.42, 166.91 and 65.75

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 166.91 = 65.75 : x
2. Step 2: Convert to fraction form
   111.42/166.91 = 65.75/x
3. Step 3: Cross multiply
   111.42x = 166.91 × 65.75
4. Step 4: Simplify right side
   111.42x = 10,973.17
5. Step 5: Solve for x
   x = 10,973.17/111.42
6. Step 6: Final answer
   x = 98.48