Finding the Fourth Proportional to 142,583.72, 196,786.24 and 82,142.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,583.72 : 196,786.24 = 82,142.60 : x
2. Step 2: Convert to fraction form
   142,583.72/196,786.24 = 82,142.60/x
3. Step 3: Cross multiply
   142,583.72x = 196,786.24 × 82,142.60
4. Step 4: Simplify right side
   142,583.72x = 16,164,533,397.82
5. Step 5: Solve for x
   x = 16,164,533,397.82/142,583.72
6. Step 6: Final answer
   x = 113,368.72