Finding the Fourth Proportional to 108.72, 149.88 and 67.24

Step by Step Solution

1. Step 1: Write the proportion equation
   108.72 : 149.88 = 67.24 : x
2. Step 2: Convert to fraction form
   108.72/149.88 = 67.24/x
3. Step 3: Cross multiply
   108.72x = 149.88 × 67.24
4. Step 4: Simplify right side
   108.72x = 10,078.01
5. Step 5: Solve for x
   x = 10,078.01/108.72
6. Step 6: Final answer
   x = 92.70