Finding the Third Proportional to 293,360,821.50 and 621,697,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   293,360,821.50 : 621,697,105.50 = 621,697,105.50 : x
2. Step 2: Convert to fraction form
   293,360,821.50/621,697,105.50 = 621,697,105.50/x
3. Step 3: Cross multiply
   293,360,821.50x = 621,697,105.50 × 621,697,105.50
4. Step 4: Simplify right side
   293,360,821.50x = 386,507,290,987,078,144
5. Step 5: Solve for x
   x = 386,507,290,987,078,144/293,360,821.50
6. Step 6: Final answer
   x = 1,317,515,028.12