Finding the Third Proportional to 320,584.50 and 677,214

Step by Step Solution

1. Step 1: Write the proportion equation
   320,584.50 : 677,214 = 677,214 : x
2. Step 2: Convert to fraction form
   320,584.50/677,214 = 677,214/x
3. Step 3: Cross multiply
   320,584.50x = 677,214 × 677,214
4. Step 4: Simplify right side
   320,584.50x = 458,618,801,796
5. Step 5: Solve for x
   x = 458,618,801,796/320,584.50
6. Step 6: Final answer
   x = 1,430,570.73