Finding the Third Proportional to 1,605,408 and 2,186,640

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605,408 : 2,186,640 = 2,186,640 : x
2. Step 2: Convert to fraction form
   1,605,408/2,186,640 = 2,186,640/x
3. Step 3: Cross multiply
   1,605,408x = 2,186,640 × 2,186,640
4. Step 4: Simplify right side
   1,605,408x = 4,781,394,489,600
5. Step 5: Solve for x
   x = 4,781,394,489,600/1,605,408
6. Step 6: Final answer
   x = 2,978,304.89