Finding the Fourth Proportional to 142,142.70, 196,168.43 and 81,732.97

Step by Step Solution

1. Step 1: Write the proportion equation
   142,142.70 : 196,168.43 = 81,732.97 : x
2. Step 2: Convert to fraction form
   142,142.70/196,168.43 = 81,732.97/x
3. Step 3: Cross multiply
   142,142.70x = 196,168.43 × 81,732.97
4. Step 4: Simplify right side
   142,142.70x = 16,033,429,405.40
5. Step 5: Solve for x
   x = 16,033,429,405.40/142,142.70
6. Step 6: Final answer
   x = 112,798.12