Finding the Fourth Proportional to 142.37, 196.37 and 87.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142.37 : 196.37 = 87.05 : x
2. Step 2: Convert to fraction form
   142.37/196.37 = 87.05/x
3. Step 3: Cross multiply
   142.37x = 196.37 × 87.05
4. Step 4: Simplify right side
   142.37x = 17,093.03
5. Step 5: Solve for x
   x = 17,093.03/142.37
6. Step 6: Final answer
   x = 120.06