Finding the Fourth Proportional to 142.42, 196.50 and 103.54

Step by Step Solution

1. Step 1: Write the proportion equation
   142.42 : 196.50 = 103.54 : x
2. Step 2: Convert to fraction form
   142.42/196.50 = 103.54/x
3. Step 3: Cross multiply
   142.42x = 196.50 × 103.54
4. Step 4: Simplify right side
   142.42x = 20,345.61
5. Step 5: Solve for x
   x = 20,345.61/142.42
6. Step 6: Final answer
   x = 142.86