Finding the Third Proportional to 644,809.50 and 1,401,601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,809.50 : 1,401,601.50 = 1,401,601.50 : x
2. Step 2: Convert to fraction form
   644,809.50/1,401,601.50 = 1,401,601.50/x
3. Step 3: Cross multiply
   644,809.50x = 1,401,601.50 × 1,401,601.50
4. Step 4: Simplify right side
   644,809.50x = 1,964,486,764,802.25
5. Step 5: Solve for x
   x = 1,964,486,764,802.25/644,809.50
6. Step 6: Final answer
   x = 3,046,615.73