Finding the Fourth Proportional to 142,616.28, 196,809.12 and 82,164.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,616.28 : 196,809.12 = 82,164.72 : x
2. Step 2: Convert to fraction form
   142,616.28/196,809.12 = 82,164.72/x
3. Step 3: Cross multiply
   142,616.28x = 196,809.12 × 82,164.72
4. Step 4: Simplify right side
   142,616.28x = 16,170,766,238.25
5. Step 5: Solve for x
   x = 16,170,766,238.25/142,616.28
6. Step 6: Final answer
   x = 113,386.54