Finding the Third Proportional to 151,353 and 321,155

Step by Step Solution

1. Step 1: Write the proportion equation
   151,353 : 321,155 = 321,155 : x
2. Step 2: Convert to fraction form
   151,353/321,155 = 321,155/x
3. Step 3: Cross multiply
   151,353x = 321,155 × 321,155
4. Step 4: Simplify right side
   151,353x = 103,140,534,025
5. Step 5: Solve for x
   x = 103,140,534,025/151,353
6. Step 6: Final answer
   x = 681,456.82