Finding the Third Proportional to 321,307 and 697,925.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,307 : 697,925.50 = 697,925.50 : x
2. Step 2: Convert to fraction form
   321,307/697,925.50 = 697,925.50/x
3. Step 3: Cross multiply
   321,307x = 697,925.50 × 697,925.50
4. Step 4: Simplify right side
   321,307x = 487,100,003,550.25
5. Step 5: Solve for x
   x = 487,100,003,550.25/321,307
6. Step 6: Final answer
   x = 1,515,995.62