Finding the Third Proportional to 817,821 and 1,784,355

Step by Step Solution

1. Step 1: Write the proportion equation
   817,821 : 1,784,355 = 1,784,355 : x
2. Step 2: Convert to fraction form
   817,821/1,784,355 = 1,784,355/x
3. Step 3: Cross multiply
   817,821x = 1,784,355 × 1,784,355
4. Step 4: Simplify right side
   817,821x = 3,183,922,766,025
5. Step 5: Solve for x
   x = 3,183,922,766,025/817,821
6. Step 6: Final answer
   x = 3,893,178.05