Finding the Fourth Proportional to 142.93, 196.90 and 101.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142.93 : 196.90 = 101.42 : x
2. Step 2: Convert to fraction form
   142.93/196.90 = 101.42/x
3. Step 3: Cross multiply
   142.93x = 196.90 × 101.42
4. Step 4: Simplify right side
   142.93x = 19,969.10
5. Step 5: Solve for x
   x = 19,969.10/142.93
6. Step 6: Final answer
   x = 139.71