Finding the Fourth Proportional to 111.38, 167.31 and 70.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.38 : 167.31 = 70.82 : x
2. Step 2: Convert to fraction form
   111.38/167.31 = 70.82/x
3. Step 3: Cross multiply
   111.38x = 167.31 × 70.82
4. Step 4: Simplify right side
   111.38x = 11,848.89
5. Step 5: Solve for x
   x = 11,848.89/111.38
6. Step 6: Final answer
   x = 106.38