Finding the Third Proportional to 321,120 and 500,068

Step by Step Solution

1. Step 1: Write the proportion equation
   321,120 : 500,068 = 500,068 : x
2. Step 2: Convert to fraction form
   321,120/500,068 = 500,068/x
3. Step 3: Cross multiply
   321,120x = 500,068 × 500,068
4. Step 4: Simplify right side
   321,120x = 250,068,004,624
5. Step 5: Solve for x
   x = 250,068,004,624/321,120
6. Step 6: Final answer
   x = 778,736.94