Finding the Third Proportional to 396,669 and 872,065.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,669 : 872,065.50 = 872,065.50 : x
2. Step 2: Convert to fraction form
   396,669/872,065.50 = 872,065.50/x
3. Step 3: Cross multiply
   396,669x = 872,065.50 × 872,065.50
4. Step 4: Simplify right side
   396,669x = 760,498,236,290.25
5. Step 5: Solve for x
   x = 760,498,236,290.25/396,669
6. Step 6: Final answer
   x = 1,917,211.17