Finding the Fourth Proportional to 142.45, 196.69 and 116.22

Step by Step Solution

1. Step 1: Write the proportion equation
   142.45 : 196.69 = 116.22 : x
2. Step 2: Convert to fraction form
   142.45/196.69 = 116.22/x
3. Step 3: Cross multiply
   142.45x = 196.69 × 116.22
4. Step 4: Simplify right side
   142.45x = 22,859.31
5. Step 5: Solve for x
   x = 22,859.31/142.45
6. Step 6: Final answer
   x = 160.47