Finding the Fourth Proportional to 111.43, 167.23 and 72.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.43 : 167.23 = 72.82 : x
2. Step 2: Convert to fraction form
   111.43/167.23 = 72.82/x
3. Step 3: Cross multiply
   111.43x = 167.23 × 72.82
4. Step 4: Simplify right side
   111.43x = 12,177.69
5. Step 5: Solve for x
   x = 12,177.69/111.43
6. Step 6: Final answer
   x = 109.29