Finding the Third Proportional to 1,022,991 and 1,489,509

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022,991 : 1,489,509 = 1,489,509 : x
2. Step 2: Convert to fraction form
   1,022,991/1,489,509 = 1,489,509/x
3. Step 3: Cross multiply
   1,022,991x = 1,489,509 × 1,489,509
4. Step 4: Simplify right side
   1,022,991x = 2,218,637,061,081
5. Step 5: Solve for x
   x = 2,218,637,061,081/1,022,991
6. Step 6: Final answer
   x = 2,168,774.76