Finding the Third Proportional to 322,066 and 699,627.50

Step by Step Solution

1. Step 1: Write the proportion equation
   322,066 : 699,627.50 = 699,627.50 : x
2. Step 2: Convert to fraction form
   322,066/699,627.50 = 699,627.50/x
3. Step 3: Cross multiply
   322,066x = 699,627.50 × 699,627.50
4. Step 4: Simplify right side
   322,066x = 489,478,638,756.25
5. Step 5: Solve for x
   x = 489,478,638,756.25/322,066
6. Step 6: Final answer
   x = 1,519,808.48