Finding the Third Proportional to 321,572 and 700,456

Step by Step Solution

1. Step 1: Write the proportion equation
   321,572 : 700,456 = 700,456 : x
2. Step 2: Convert to fraction form
   321,572/700,456 = 700,456/x
3. Step 3: Cross multiply
   321,572x = 700,456 × 700,456
4. Step 4: Simplify right side
   321,572x = 490,638,607,936
5. Step 5: Solve for x
   x = 490,638,607,936/321,572
6. Step 6: Final answer
   x = 1,525,750.40