Finding the Fourth Proportional to 111.27, 167.01 and 70.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111.27 : 167.01 = 70.72 : x
2. Step 2: Convert to fraction form
   111.27/167.01 = 70.72/x
3. Step 3: Cross multiply
   111.27x = 167.01 × 70.72
4. Step 4: Simplify right side
   111.27x = 11,810.95
5. Step 5: Solve for x
   x = 11,810.95/111.27
6. Step 6: Final answer
   x = 106.15