Finding the Third Proportional to 79,978,891,534 and 171,994,331,216

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978,891,534 : 171,994,331,216 = 171,994,331,216 : x
2. Step 2: Convert to fraction form
   79,978,891,534/171,994,331,216 = 171,994,331,216/x
3. Step 3: Cross multiply
   79,978,891,534x = 171,994,331,216 × 171,994,331,216
4. Step 4: Simplify right side
   79,978,891,534x = 29,582,049,970,439,111,835,648
5. Step 5: Solve for x
   x = 29,582,049,970,439,111,835,648/79,978,891,534
6. Step 6: Final answer
   x = 369,873,217,833.53