Finding the Third Proportional to 315,493.50 and 684,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,493.50 : 684,019.50 = 684,019.50 : x
2. Step 2: Convert to fraction form
   315,493.50/684,019.50 = 684,019.50/x
3. Step 3: Cross multiply
   315,493.50x = 684,019.50 × 684,019.50
4. Step 4: Simplify right side
   315,493.50x = 467,882,676,380.25
5. Step 5: Solve for x
   x = 467,882,676,380.25/315,493.50
6. Step 6: Final answer
   x = 1,483,018.43