Finding the Fourth Proportional to 225.72, 338.36 and 88.72

Step by Step Solution

1. Step 1: Write the proportion equation
   225.72 : 338.36 = 88.72 : x
2. Step 2: Convert to fraction form
   225.72/338.36 = 88.72/x
3. Step 3: Cross multiply
   225.72x = 338.36 × 88.72
4. Step 4: Simplify right side
   225.72x = 30,019.30
5. Step 5: Solve for x
   x = 30,019.30/225.72
6. Step 6: Final answer
   x = 132.99