Finding the Fourth Proportional to 142,580.56, 196,785.58 and 82,140.38

Step by Step Solution

1. Step 1: Write the proportion equation
   142,580.56 : 196,785.58 = 82,140.38 : x
2. Step 2: Convert to fraction form
   142,580.56/196,785.58 = 82,140.38/x
3. Step 3: Cross multiply
   142,580.56x = 196,785.58 × 82,140.38
4. Step 4: Simplify right side
   142,580.56x = 16,164,042,319.72
5. Step 5: Solve for x
   x = 16,164,042,319.72/142,580.56
6. Step 6: Final answer
   x = 113,367.79