Finding the Third Proportional to 621,821 and 1,359,634

Step by Step Solution

1. Step 1: Write the proportion equation
   621,821 : 1,359,634 = 1,359,634 : x
2. Step 2: Convert to fraction form
   621,821/1,359,634 = 1,359,634/x
3. Step 3: Cross multiply
   621,821x = 1,359,634 × 1,359,634
4. Step 4: Simplify right side
   621,821x = 1,848,604,613,956
5. Step 5: Solve for x
   x = 1,848,604,613,956/621,821
6. Step 6: Final answer
   x = 2,972,888.68