Finding the Third Proportional to 335,704 and 686,919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   335,704 : 686,919.50 = 686,919.50 : x
2. Step 2: Convert to fraction form
   335,704/686,919.50 = 686,919.50/x
3. Step 3: Cross multiply
   335,704x = 686,919.50 × 686,919.50
4. Step 4: Simplify right side
   335,704x = 471,858,399,480.25
5. Step 5: Solve for x
   x = 471,858,399,480.25/335,704
6. Step 6: Final answer
   x = 1,405,578.72