Finding the Third Proportional to 321,570 and 719,259.75

Step by Step Solution

1. Step 1: Write the proportion equation
   321,570 : 719,259.75 = 719,259.75 : x
2. Step 2: Convert to fraction form
   321,570/719,259.75 = 719,259.75/x
3. Step 3: Cross multiply
   321,570x = 719,259.75 × 719,259.75
4. Step 4: Simplify right side
   321,570x = 517,334,587,970.06
5. Step 5: Solve for x
   x = 517,334,587,970.06/321,570
6. Step 6: Final answer
   x = 1,608,777.52