Finding the Third Proportional to 321,308 and 697,928

Step by Step Solution

1. Step 1: Write the proportion equation
   321,308 : 697,928 = 697,928 : x
2. Step 2: Convert to fraction form
   321,308/697,928 = 697,928/x
3. Step 3: Cross multiply
   321,308x = 697,928 × 697,928
4. Step 4: Simplify right side
   321,308x = 487,103,493,184
5. Step 5: Solve for x
   x = 487,103,493,184/321,308
6. Step 6: Final answer
   x = 1,516,001.76