Finding the Fourth Proportional to 142.41, 196.43 and 109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142.41 : 196.43 = 109.30 : x
2. Step 2: Convert to fraction form
   142.41/196.43 = 109.30/x
3. Step 3: Cross multiply
   142.41x = 196.43 × 109.30
4. Step 4: Simplify right side
   142.41x = 21,469.13
5. Step 5: Solve for x
   x = 21,469.13/142.41
6. Step 6: Final answer
   x = 150.76