Finding the Third Proportional to 1,103,163 and 1,686,821

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103,163 : 1,686,821 = 1,686,821 : x
2. Step 2: Convert to fraction form
   1,103,163/1,686,821 = 1,686,821/x
3. Step 3: Cross multiply
   1,103,163x = 1,686,821 × 1,686,821
4. Step 4: Simplify right side
   1,103,163x = 2,845,365,086,041
5. Step 5: Solve for x
   x = 2,845,365,086,041/1,103,163
6. Step 6: Final answer
   x = 2,579,278.93