Finding the Third Proportional to 399,058,770,900 and 868,367,978,664

Step by Step Solution

1. Step 1: Write the proportion equation
   399,058,770,900 : 868,367,978,664 = 868,367,978,664 : x
2. Step 2: Convert to fraction form
   399,058,770,900/868,367,978,664 = 868,367,978,664/x
3. Step 3: Cross multiply
   399,058,770,900x = 868,367,978,664 × 868,367,978,664
4. Step 4: Simplify right side
   399,058,770,900x = 754,062,946,369,001,125,576,704
5. Step 5: Solve for x
   x = 754,062,946,369,001,125,576,704/399,058,770,900
6. Step 6: Final answer
   x = 1,889,603,740,993.73