Finding the Third Proportional to 628,389,446 and 1,321,898,992

Step by Step Solution

1. Step 1: Write the proportion equation
   628,389,446 : 1,321,898,992 = 1,321,898,992 : x
2. Step 2: Convert to fraction form
   628,389,446/1,321,898,992 = 1,321,898,992/x
3. Step 3: Cross multiply
   628,389,446x = 1,321,898,992 × 1,321,898,992
4. Step 4: Simplify right side
   628,389,446x = 1,747,416,945,050,616,064
5. Step 5: Solve for x
   x = 1,747,416,945,050,616,064/628,389,446
6. Step 6: Final answer
   x = 2,780,786,590.50