Finding the Third Proportional to 311,067 and 677,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,067 : 677,443.50 = 677,443.50 : x
2. Step 2: Convert to fraction form
   311,067/677,443.50 = 677,443.50/x
3. Step 3: Cross multiply
   311,067x = 677,443.50 × 677,443.50
4. Step 4: Simplify right side
   311,067x = 458,929,695,692.25
5. Step 5: Solve for x
   x = 458,929,695,692.25/311,067
6. Step 6: Final answer
   x = 1,475,340.35