Finding the Fourth Proportional to 142,580.42, 196,781.76 and 82,139.43

Step by Step Solution

1. Step 1: Write the proportion equation
   142,580.42 : 196,781.76 = 82,139.43 : x
2. Step 2: Convert to fraction form
   142,580.42/196,781.76 = 82,139.43/x
3. Step 3: Cross multiply
   142,580.42x = 196,781.76 × 82,139.43
4. Step 4: Simplify right side
   142,580.42x = 16,163,542,338.73
5. Step 5: Solve for x
   x = 16,163,542,338.73/142,580.42
6. Step 6: Final answer
   x = 113,364.39