Finding the Fourth Proportional to 142.73, 196.83 and 103.65

Step by Step Solution

1. Step 1: Write the proportion equation
   142.73 : 196.83 = 103.65 : x
2. Step 2: Convert to fraction form
   142.73/196.83 = 103.65/x
3. Step 3: Cross multiply
   142.73x = 196.83 × 103.65
4. Step 4: Simplify right side
   142.73x = 20,401.43
5. Step 5: Solve for x
   x = 20,401.43/142.73
6. Step 6: Final answer
   x = 142.94