Finding the Third Proportional to 335,448 and 670,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   335,448 : 670,618.50 = 670,618.50 : x
2. Step 2: Convert to fraction form
   335,448/670,618.50 = 670,618.50/x
3. Step 3: Cross multiply
   335,448x = 670,618.50 × 670,618.50
4. Step 4: Simplify right side
   335,448x = 449,729,172,542.25
5. Step 5: Solve for x
   x = 449,729,172,542.25/335,448
6. Step 6: Final answer
   x = 1,340,682.23