Finding the Third Proportional to 408,069 and 621,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,069 : 621,130.50 = 621,130.50 : x
2. Step 2: Convert to fraction form
   408,069/621,130.50 = 621,130.50/x
3. Step 3: Cross multiply
   408,069x = 621,130.50 × 621,130.50
4. Step 4: Simplify right side
   408,069x = 385,803,098,030.25
5. Step 5: Solve for x
   x = 385,803,098,030.25/408,069
6. Step 6: Final answer
   x = 945,435.94