Finding the Fourth Proportional to 144.41, 216.78 and 82.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144.41 : 216.78 = 82.72 : x
2. Step 2: Convert to fraction form
   144.41/216.78 = 82.72/x
3. Step 3: Cross multiply
   144.41x = 216.78 × 82.72
4. Step 4: Simplify right side
   144.41x = 17,932.04
5. Step 5: Solve for x
   x = 17,932.04/144.41
6. Step 6: Final answer
   x = 124.17