Finding the Fourth Proportional to 144.72, 199.71 and 82.56

Step by Step Solution

1. Step 1: Write the proportion equation
   144.72 : 199.71 = 82.56 : x
2. Step 2: Convert to fraction form
   144.72/199.71 = 82.56/x
3. Step 3: Cross multiply
   144.72x = 199.71 × 82.56
4. Step 4: Simplify right side
   144.72x = 16,488.81
5. Step 5: Solve for x
   x = 16,488.81/144.72
6. Step 6: Final answer
   x = 113.94