Finding the Fourth Proportional to 142,059.80, 196,076.02 and 81,665.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142,059.80 : 196,076.02 = 81,665.48 : x
2. Step 2: Convert to fraction form
   142,059.80/196,076.02 = 81,665.48/x
3. Step 3: Cross multiply
   142,059.80x = 196,076.02 × 81,665.48
4. Step 4: Simplify right side
   142,059.80x = 16,012,642,289.79
5. Step 5: Solve for x
   x = 16,012,642,289.79/142,059.80
6. Step 6: Final answer
   x = 112,717.62