Finding the Third Proportional to 396,579 and 838,366.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,579 : 838,366.50 = 838,366.50 : x
2. Step 2: Convert to fraction form
   396,579/838,366.50 = 838,366.50/x
3. Step 3: Cross multiply
   396,579x = 838,366.50 × 838,366.50
4. Step 4: Simplify right side
   396,579x = 702,858,388,322.25
5. Step 5: Solve for x
   x = 702,858,388,322.25/396,579
6. Step 6: Final answer
   x = 1,772,303.60