Finding the Fourth Proportional to 142,047.73, 196,036.93 and 81,639.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,047.73 : 196,036.93 = 81,639.45 : x
2. Step 2: Convert to fraction form
   142,047.73/196,036.93 = 81,639.45/x
3. Step 3: Cross multiply
   142,047.73x = 196,036.93 × 81,639.45
4. Step 4: Simplify right side
   142,047.73x = 16,004,347,144.89
5. Step 5: Solve for x
   x = 16,004,347,144.89/142,047.73
6. Step 6: Final answer
   x = 112,668.80