Finding the Fourth Proportional to 142,578.20, 196,762.56 and 82,144.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,578.20 : 196,762.56 = 82,144.10 : x
2. Step 2: Convert to fraction form
   142,578.20/196,762.56 = 82,144.10/x
3. Step 3: Cross multiply
   142,578.20x = 196,762.56 × 82,144.10
4. Step 4: Simplify right side
   142,578.20x = 16,162,883,404.90
5. Step 5: Solve for x
   x = 16,162,883,404.90/142,578.20
6. Step 6: Final answer
   x = 113,361.53