Finding the Fourth Proportional to 142,394.28, 196,499.28 and 81,956.54

Step by Step Solution

1. Step 1: Write the proportion equation
   142,394.28 : 196,499.28 = 81,956.54 : x
2. Step 2: Convert to fraction form
   142,394.28/196,499.28 = 81,956.54/x
3. Step 3: Cross multiply
   142,394.28x = 196,499.28 × 81,956.54
4. Step 4: Simplify right side
   142,394.28x = 16,104,401,101.29
5. Step 5: Solve for x
   x = 16,104,401,101.29/142,394.28
6. Step 6: Final answer
   x = 113,097.25