Finding the Third Proportional to 79,978,891,491 and 171,994,331,133

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978,891,491 : 171,994,331,133 = 171,994,331,133 : x
2. Step 2: Convert to fraction form
   79,978,891,491/171,994,331,133 = 171,994,331,133/x
3. Step 3: Cross multiply
   79,978,891,491x = 171,994,331,133 × 171,994,331,133
4. Step 4: Simplify right side
   79,978,891,491x = 29,582,049,941,888,052,494,336
5. Step 5: Solve for x
   x = 29,582,049,941,888,052,494,336/79,978,891,491
6. Step 6: Final answer
   x = 369,873,217,675.40