Finding the Third Proportional to 12,842,372,261 and 19,647,391,653

Step by Step Solution

1. Step 1: Write the proportion equation
   12,842,372,261 : 19,647,391,653 = 19,647,391,653 : x
2. Step 2: Convert to fraction form
   12,842,372,261/19,647,391,653 = 19,647,391,653/x
3. Step 3: Cross multiply
   12,842,372,261x = 19,647,391,653 × 19,647,391,653
4. Step 4: Simplify right side
   12,842,372,261x = 386,019,998,766,374,060,032
5. Step 5: Solve for x
   x = 386,019,998,766,374,060,032/12,842,372,261
6. Step 6: Final answer
   x = 30,058,309,393.40