Finding the Third Proportional to 851,812 and 1,821,813

Step by Step Solution

1. Step 1: Write the proportion equation
   851,812 : 1,821,813 = 1,821,813 : x
2. Step 2: Convert to fraction form
   851,812/1,821,813 = 1,821,813/x
3. Step 3: Cross multiply
   851,812x = 1,821,813 × 1,821,813
4. Step 4: Simplify right side
   851,812x = 3,319,002,606,969
5. Step 5: Solve for x
   x = 3,319,002,606,969/851,812
6. Step 6: Final answer
   x = 3,896,402.74