Finding the Fourth Proportional to 142.09, 196.06 and 79.91

Step by Step Solution

1. Step 1: Write the proportion equation
   142.09 : 196.06 = 79.91 : x
2. Step 2: Convert to fraction form
   142.09/196.06 = 79.91/x
3. Step 3: Cross multiply
   142.09x = 196.06 × 79.91
4. Step 4: Simplify right side
   142.09x = 15,667.15
5. Step 5: Solve for x
   x = 15,667.15/142.09
6. Step 6: Final answer
   x = 110.26