Finding the Third Proportional to 309,622.50 and 682,099.88

Step by Step Solution

1. Step 1: Write the proportion equation
   309,622.50 : 682,099.88 = 682,099.88 : x
2. Step 2: Convert to fraction form
   309,622.50/682,099.88 = 682,099.88/x
3. Step 3: Cross multiply
   309,622.50x = 682,099.88 × 682,099.88
4. Step 4: Simplify right side
   309,622.50x = 465,260,239,475.02
5. Step 5: Solve for x
   x = 465,260,239,475.02/309,622.50
6. Step 6: Final answer
   x = 1,502,669.35