Finding the Third Proportional to 319,356 and 697,486.50

Step by Step Solution

1. Step 1: Write the proportion equation
   319,356 : 697,486.50 = 697,486.50 : x
2. Step 2: Convert to fraction form
   319,356/697,486.50 = 697,486.50/x
3. Step 3: Cross multiply
   319,356x = 697,486.50 × 697,486.50
4. Step 4: Simplify right side
   319,356x = 486,487,417,682.25
5. Step 5: Solve for x
   x = 486,487,417,682.25/319,356
6. Step 6: Final answer
   x = 1,523,338.90