Finding the Third Proportional to 79,978,891,857 and 171,994,331,874

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978,891,857 : 171,994,331,874 = 171,994,331,874 : x
2. Step 2: Convert to fraction form
   79,978,891,857/171,994,331,874 = 171,994,331,874/x
3. Step 3: Cross multiply
   79,978,891,857x = 171,994,331,874 × 171,994,331,874
4. Step 4: Simplify right side
   79,978,891,857x = 29,582,050,196,783,653,453,824
5. Step 5: Solve for x
   x = 29,582,050,196,783,653,453,824/79,978,891,857
6. Step 6: Final answer
   x = 369,873,219,169.82