Finding the Third Proportional to 399,058,770,832 and 868,367,978,528

Step by Step Solution

1. Step 1: Write the proportion equation
   399,058,770,832 : 868,367,978,528 = 868,367,978,528 : x
2. Step 2: Convert to fraction form
   399,058,770,832/868,367,978,528 = 868,367,978,528/x
3. Step 3: Cross multiply
   399,058,770,832x = 868,367,978,528 × 868,367,978,528
4. Step 4: Simplify right side
   399,058,770,832x = 754,062,946,132,805,036,277,760
5. Step 5: Solve for x
   x = 754,062,946,132,805,036,277,760/399,058,770,832
6. Step 6: Final answer
   x = 1,889,603,740,723.84