Finding the Fourth Proportional to 142,046.73, 196,035.55 and 81,638.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,046.73 : 196,035.55 = 81,638.45 : x
2. Step 2: Convert to fraction form
   142,046.73/196,035.55 = 81,638.45/x
3. Step 3: Cross multiply
   142,046.73x = 196,035.55 × 81,638.45
4. Step 4: Simplify right side
   142,046.73x = 16,004,038,446.90
5. Step 5: Solve for x
   x = 16,004,038,446.90/142,046.73
6. Step 6: Final answer
   x = 112,667.42