Finding the Third Proportional to 644,413.50 and 1,272,557.25

Step by Step Solution

1. Step 1: Write the proportion equation
   644,413.50 : 1,272,557.25 = 1,272,557.25 : x
2. Step 2: Convert to fraction form
   644,413.50/1,272,557.25 = 1,272,557.25/x
3. Step 3: Cross multiply
   644,413.50x = 1,272,557.25 × 1,272,557.25
4. Step 4: Simplify right side
   644,413.50x = 1,619,401,954,527.56
5. Step 5: Solve for x
   x = 1,619,401,954,527.56/644,413.50
6. Step 6: Final answer
   x = 2,512,985.77