Finding the Third Proportional to 321,434 and 613,696

Step by Step Solution

1. Step 1: Write the proportion equation
   321,434 : 613,696 = 613,696 : x
2. Step 2: Convert to fraction form
   321,434/613,696 = 613,696/x
3. Step 3: Cross multiply
   321,434x = 613,696 × 613,696
4. Step 4: Simplify right side
   321,434x = 376,622,780,416
5. Step 5: Solve for x
   x = 376,622,780,416/321,434
6. Step 6: Final answer
   x = 1,171,695.53