Finding the Fourth Proportional to 111.98, 167.72 and 69.14

Step by Step Solution

1. Step 1: Write the proportion equation
   111.98 : 167.72 = 69.14 : x
2. Step 2: Convert to fraction form
   111.98/167.72 = 69.14/x
3. Step 3: Cross multiply
   111.98x = 167.72 × 69.14
4. Step 4: Simplify right side
   111.98x = 11,596.16
5. Step 5: Solve for x
   x = 11,596.16/111.98
6. Step 6: Final answer
   x = 103.56