Finding the Third Proportional to 321,975 and 699,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,975 : 699,259.50 = 699,259.50 : x
2. Step 2: Convert to fraction form
   321,975/699,259.50 = 699,259.50/x
3. Step 3: Cross multiply
   321,975x = 699,259.50 × 699,259.50
4. Step 4: Simplify right side
   321,975x = 488,963,848,340.25
5. Step 5: Solve for x
   x = 488,963,848,340.25/321,975
6. Step 6: Final answer
   x = 1,518,639.17