Finding the Third Proportional to 411,337 and 621,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   411,337 : 621,379.50 = 621,379.50 : x
2. Step 2: Convert to fraction form
   411,337/621,379.50 = 621,379.50/x
3. Step 3: Cross multiply
   411,337x = 621,379.50 × 621,379.50
4. Step 4: Simplify right side
   411,337x = 386,112,483,020.25
5. Step 5: Solve for x
   x = 386,112,483,020.25/411,337
6. Step 6: Final answer
   x = 938,676.76