Finding the Third Proportional to 12,842,372,255 and 19,647,391,643

Step by Step Solution

1. Step 1: Write the proportion equation
   12,842,372,255 : 19,647,391,643 = 19,647,391,643 : x
2. Step 2: Convert to fraction form
   12,842,372,255/19,647,391,643 = 19,647,391,643/x
3. Step 3: Cross multiply
   12,842,372,255x = 19,647,391,643 × 19,647,391,643
4. Step 4: Simplify right side
   12,842,372,255x = 386,019,998,373,426,233,344
5. Step 5: Solve for x
   x = 386,019,998,373,426,233,344/12,842,372,255
6. Step 6: Final answer
   x = 30,058,309,376.85