Finding the Third Proportional to 396,864 and 872,743.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,864 : 872,743.50 = 872,743.50 : x
2. Step 2: Convert to fraction form
   396,864/872,743.50 = 872,743.50/x
3. Step 3: Cross multiply
   396,864x = 872,743.50 × 872,743.50
4. Step 4: Simplify right side
   396,864x = 761,681,216,792.25
5. Step 5: Solve for x
   x = 761,681,216,792.25/396,864
6. Step 6: Final answer
   x = 1,919,249.96