Finding the Fourth Proportional to 111.42, 167.25 and 72.99

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 167.25 = 72.99 : x
2. Step 2: Convert to fraction form
   111.42/167.25 = 72.99/x
3. Step 3: Cross multiply
   111.42x = 167.25 × 72.99
4. Step 4: Simplify right side
   111.42x = 12,207.58
5. Step 5: Solve for x
   x = 12,207.58/111.42
6. Step 6: Final answer
   x = 109.56