Finding the Fourth Proportional to 111.38, 167.01 and 72.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.38 : 167.01 = 72.82 : x
2. Step 2: Convert to fraction form
   111.38/167.01 = 72.82/x
3. Step 3: Cross multiply
   111.38x = 167.01 × 72.82
4. Step 4: Simplify right side
   111.38x = 12,160.98
5. Step 5: Solve for x
   x = 12,160.98/111.38
6. Step 6: Final answer
   x = 109.18