Finding the Third Proportional to 128,025 and 200,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,025 : 200,839.50 = 200,839.50 : x
2. Step 2: Convert to fraction form
   128,025/200,839.50 = 200,839.50/x
3. Step 3: Cross multiply
   128,025x = 200,839.50 × 200,839.50
4. Step 4: Simplify right side
   128,025x = 40,336,504,760.25
5. Step 5: Solve for x
   x = 40,336,504,760.25/128,025
6. Step 6: Final answer
   x = 315,067.41