Finding the Third Proportional to 321,298 and 705,656

Step by Step Solution

1. Step 1: Write the proportion equation
   321,298 : 705,656 = 705,656 : x
2. Step 2: Convert to fraction form
   321,298/705,656 = 705,656/x
3. Step 3: Cross multiply
   321,298x = 705,656 × 705,656
4. Step 4: Simplify right side
   321,298x = 497,950,390,336
5. Step 5: Solve for x
   x = 497,950,390,336/321,298
6. Step 6: Final answer
   x = 1,549,808.56