Finding the Fourth Proportional to 142.77, 196.96 and 109.97

Step by Step Solution

1. Step 1: Write the proportion equation
   142.77 : 196.96 = 109.97 : x
2. Step 2: Convert to fraction form
   142.77/196.96 = 109.97/x
3. Step 3: Cross multiply
   142.77x = 196.96 × 109.97
4. Step 4: Simplify right side
   142.77x = 21,659.69
5. Step 5: Solve for x
   x = 21,659.69/142.77
6. Step 6: Final answer
   x = 151.71