Finding the Fourth Proportional to 144.06, 198.72 and 102.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144.06 : 198.72 = 102.72 : x
2. Step 2: Convert to fraction form
   144.06/198.72 = 102.72/x
3. Step 3: Cross multiply
   144.06x = 198.72 × 102.72
4. Step 4: Simplify right side
   144.06x = 20,412.52
5. Step 5: Solve for x
   x = 20,412.52/144.06
6. Step 6: Final answer
   x = 141.69