Finding the Third Proportional to 663,019 and 1,019,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   663,019 : 1,019,698.50 = 1,019,698.50 : x
2. Step 2: Convert to fraction form
   663,019/1,019,698.50 = 1,019,698.50/x
3. Step 3: Cross multiply
   663,019x = 1,019,698.50 × 1,019,698.50
4. Step 4: Simplify right side
   663,019x = 1,039,785,030,902.25
5. Step 5: Solve for x
   x = 1,039,785,030,902.25/663,019
6. Step 6: Final answer
   x = 1,568,258.27