Finding the Third Proportional to 79,978,891,459 and 171,994,331,077

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978,891,459 : 171,994,331,077 = 171,994,331,077 : x
2. Step 2: Convert to fraction form
   79,978,891,459/171,994,331,077 = 171,994,331,077/x
3. Step 3: Cross multiply
   79,978,891,459x = 171,994,331,077 × 171,994,331,077
4. Step 4: Simplify right side
   79,978,891,459x = 29,582,049,922,624,687,964,160
5. Step 5: Solve for x
   x = 29,582,049,922,624,687,964,160/79,978,891,459
6. Step 6: Final answer
   x = 369,873,217,582.54