Finding the Fourth Proportional to 142.32, 196.43 and 131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142.32 : 196.43 = 131.34 : x
2. Step 2: Convert to fraction form
   142.32/196.43 = 131.34/x
3. Step 3: Cross multiply
   142.32x = 196.43 × 131.34
4. Step 4: Simplify right side
   142.32x = 25,799.12
5. Step 5: Solve for x
   x = 25,799.12/142.32
6. Step 6: Final answer
   x = 181.28