Finding the Fourth Proportional to 142,581.72, 196,783.48 and 82,140.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,581.72 : 196,783.48 = 82,140.60 : x
2. Step 2: Convert to fraction form
   142,581.72/196,783.48 = 82,140.60/x
3. Step 3: Cross multiply
   142,581.72x = 196,783.48 × 82,140.60
4. Step 4: Simplify right side
   142,581.72x = 16,163,913,117.29
5. Step 5: Solve for x
   x = 16,163,913,117.29/142,581.72
6. Step 6: Final answer
   x = 113,365.96