Finding the Third Proportional to 1,009,991 and 2,161,854

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009,991 : 2,161,854 = 2,161,854 : x
2. Step 2: Convert to fraction form
   1,009,991/2,161,854 = 2,161,854/x
3. Step 3: Cross multiply
   1,009,991x = 2,161,854 × 2,161,854
4. Step 4: Simplify right side
   1,009,991x = 4,673,612,717,316
5. Step 5: Solve for x
   x = 4,673,612,717,316/1,009,991
6. Step 6: Final answer
   x = 4,627,380.56