Finding the Fourth Proportional to 142,358.48, 196,449.46 and 81,938.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,358.48 : 196,449.46 = 81,938.42 : x
2. Step 2: Convert to fraction form
   142,358.48/196,449.46 = 81,938.42/x
3. Step 3: Cross multiply
   142,358.48x = 196,449.46 × 81,938.42
4. Step 4: Simplify right side
   142,358.48x = 16,096,757,175.16
5. Step 5: Solve for x
   x = 16,096,757,175.16/142,358.48
6. Step 6: Final answer
   x = 113,072.00