Finding the Third Proportional to 321,118 and 705,800

Step by Step Solution

1. Step 1: Write the proportion equation
   321,118 : 705,800 = 705,800 : x
2. Step 2: Convert to fraction form
   321,118/705,800 = 705,800/x
3. Step 3: Cross multiply
   321,118x = 705,800 × 705,800
4. Step 4: Simplify right side
   321,118x = 498,153,640,000
5. Step 5: Solve for x
   x = 498,153,640,000/321,118
6. Step 6: Final answer
   x = 1,551,310.23