Finding the Third Proportional to 1,397,580 and 2,109,660

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397,580 : 2,109,660 = 2,109,660 : x
2. Step 2: Convert to fraction form
   1,397,580/2,109,660 = 2,109,660/x
3. Step 3: Cross multiply
   1,397,580x = 2,109,660 × 2,109,660
4. Step 4: Simplify right side
   1,397,580x = 4,450,665,315,600
5. Step 5: Solve for x
   x = 4,450,665,315,600/1,397,580
6. Step 6: Final answer
   x = 3,184,551.38