Finding the Third Proportional to 296,326 and 640,035.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,326 : 640,035.50 = 640,035.50 : x
2. Step 2: Convert to fraction form
   296,326/640,035.50 = 640,035.50/x
3. Step 3: Cross multiply
   296,326x = 640,035.50 × 640,035.50
4. Step 4: Simplify right side
   296,326x = 409,645,441,260.25
5. Step 5: Solve for x
   x = 409,645,441,260.25/296,326
6. Step 6: Final answer
   x = 1,382,414.78