Finding the Third Proportional to 444,621 and 689,500.50

Step by Step Solution

1. Step 1: Write the proportion equation
   444,621 : 689,500.50 = 689,500.50 : x
2. Step 2: Convert to fraction form
   444,621/689,500.50 = 689,500.50/x
3. Step 3: Cross multiply
   444,621x = 689,500.50 × 689,500.50
4. Step 4: Simplify right side
   444,621x = 475,410,939,500.25
5. Step 5: Solve for x
   x = 475,410,939,500.25/444,621
6. Step 6: Final answer
   x = 1,069,249.85