Finding the Third Proportional to 1,644,320 and 3,586,660

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644,320 : 3,586,660 = 3,586,660 : x
2. Step 2: Convert to fraction form
   1,644,320/3,586,660 = 3,586,660/x
3. Step 3: Cross multiply
   1,644,320x = 3,586,660 × 3,586,660
4. Step 4: Simplify right side
   1,644,320x = 12,864,129,955,600
5. Step 5: Solve for x
   x = 12,864,129,955,600/1,644,320
6. Step 6: Final answer
   x = 7,823,373.77