Finding the Third Proportional to 79,978,891,497 and 171,994,331,145

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978,891,497 : 171,994,331,145 = 171,994,331,145 : x
2. Step 2: Convert to fraction form
   79,978,891,497/171,994,331,145 = 171,994,331,145/x
3. Step 3: Cross multiply
   79,978,891,497x = 171,994,331,145 × 171,994,331,145
4. Step 4: Simplify right side
   79,978,891,497x = 29,582,049,946,015,918,718,976
5. Step 5: Solve for x
   x = 29,582,049,946,015,918,718,976/79,978,891,497
6. Step 6: Final answer
   x = 369,873,217,699.27