Finding the Fourth Proportional to 144.18, 198.72 and 102.69

Step by Step Solution

1. Step 1: Write the proportion equation
   144.18 : 198.72 = 102.69 : x
2. Step 2: Convert to fraction form
   144.18/198.72 = 102.69/x
3. Step 3: Cross multiply
   144.18x = 198.72 × 102.69
4. Step 4: Simplify right side
   144.18x = 20,406.56
5. Step 5: Solve for x
   x = 20,406.56/144.18
6. Step 6: Final answer
   x = 141.54