Finding the Third Proportional to 396,666 and 872,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,666 : 872,059.50 = 872,059.50 : x
2. Step 2: Convert to fraction form
   396,666/872,059.50 = 872,059.50/x
3. Step 3: Cross multiply
   396,666x = 872,059.50 × 872,059.50
4. Step 4: Simplify right side
   396,666x = 760,487,771,540.25
5. Step 5: Solve for x
   x = 760,487,771,540.25/396,666
6. Step 6: Final answer
   x = 1,917,199.28