Finding the Third Proportional to 1,823,561 and 4,221,218

Step by Step Solution

1. Step 1: Write the proportion equation
   1,823,561 : 4,221,218 = 4,221,218 : x
2. Step 2: Convert to fraction form
   1,823,561/4,221,218 = 4,221,218/x
3. Step 3: Cross multiply
   1,823,561x = 4,221,218 × 4,221,218
4. Step 4: Simplify right side
   1,823,561x = 17,818,681,403,524
5. Step 5: Solve for x
   x = 17,818,681,403,524/1,823,561
6. Step 6: Final answer
   x = 9,771,365.70