Finding the Third Proportional to 1,009,772 and 2,161,391

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009,772 : 2,161,391 = 2,161,391 : x
2. Step 2: Convert to fraction form
   1,009,772/2,161,391 = 2,161,391/x
3. Step 3: Cross multiply
   1,009,772x = 2,161,391 × 2,161,391
4. Step 4: Simplify right side
   1,009,772x = 4,671,611,054,881
5. Step 5: Solve for x
   x = 4,671,611,054,881/1,009,772
6. Step 6: Final answer
   x = 4,626,401.86