Finding the Third Proportional to 1,009,778 and 2,161,404

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009,778 : 2,161,404 = 2,161,404 : x
2. Step 2: Convert to fraction form
   1,009,778/2,161,404 = 2,161,404/x
3. Step 3: Cross multiply
   1,009,778x = 2,161,404 × 2,161,404
4. Step 4: Simplify right side
   1,009,778x = 4,671,667,251,216
5. Step 5: Solve for x
   x = 4,671,667,251,216/1,009,778
6. Step 6: Final answer
   x = 4,626,430.02