Finding the Fourth Proportional to 142.73, 196.71 and 105.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142.73 : 196.71 = 105.98 : x
2. Step 2: Convert to fraction form
   142.73/196.71 = 105.98/x
3. Step 3: Cross multiply
   142.73x = 196.71 × 105.98
4. Step 4: Simplify right side
   142.73x = 20,846.34
5. Step 5: Solve for x
   x = 20,846.34/142.73
6. Step 6: Final answer
   x = 146.06