Finding the Fourth Proportional to 111.30, 166.81 and 64.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111.30 : 166.81 = 64.96 : x
2. Step 2: Convert to fraction form
   111.30/166.81 = 64.96/x
3. Step 3: Cross multiply
   111.30x = 166.81 × 64.96
4. Step 4: Simplify right side
   111.30x = 10,835.98
5. Step 5: Solve for x
   x = 10,835.98/111.30
6. Step 6: Final answer
   x = 97.36