Finding the Fourth Proportional to 111.06, 166.34 and 67.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111.06 : 166.34 = 67.69 : x
2. Step 2: Convert to fraction form
   111.06/166.34 = 67.69/x
3. Step 3: Cross multiply
   111.06x = 166.34 × 67.69
4. Step 4: Simplify right side
   111.06x = 11,259.93
5. Step 5: Solve for x
   x = 11,259.93/111.06
6. Step 6: Final answer
   x = 101.38