Finding the Third Proportional to 855,605 and 1,821,322

Step by Step Solution

1. Step 1: Write the proportion equation
   855,605 : 1,821,322 = 1,821,322 : x
2. Step 2: Convert to fraction form
   855,605/1,821,322 = 1,821,322/x
3. Step 3: Cross multiply
   855,605x = 1,821,322 × 1,821,322
4. Step 4: Simplify right side
   855,605x = 3,317,213,827,684
5. Step 5: Solve for x
   x = 3,317,213,827,684/855,605
6. Step 6: Final answer
   x = 3,877,038.85