Finding the Fourth Proportional to 142,586.72, 196,790.38 and 82,145.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,586.72 : 196,790.38 = 82,145.60 : x
2. Step 2: Convert to fraction form
   142,586.72/196,790.38 = 82,145.60/x
3. Step 3: Cross multiply
   142,586.72x = 196,790.38 × 82,145.60
4. Step 4: Simplify right side
   142,586.72x = 16,165,463,839.33
5. Step 5: Solve for x
   x = 16,165,463,839.33/142,586.72
6. Step 6: Final answer
   x = 113,372.86