Finding the Third Proportional to 296,496 and 638,020.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,496 : 638,020.50 = 638,020.50 : x
2. Step 2: Convert to fraction form
   296,496/638,020.50 = 638,020.50/x
3. Step 3: Cross multiply
   296,496x = 638,020.50 × 638,020.50
4. Step 4: Simplify right side
   296,496x = 407,070,158,420.25
5. Step 5: Solve for x
   x = 407,070,158,420.25/296,496
6. Step 6: Final answer
   x = 1,372,936.43