Finding the Third Proportional to 1,215,288 and 2,617,554

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,288 : 2,617,554 = 2,617,554 : x
2. Step 2: Convert to fraction form
   1,215,288/2,617,554 = 2,617,554/x
3. Step 3: Cross multiply
   1,215,288x = 2,617,554 × 2,617,554
4. Step 4: Simplify right side
   1,215,288x = 6,851,588,942,916
5. Step 5: Solve for x
   x = 6,851,588,942,916/1,215,288
6. Step 6: Final answer
   x = 5,637,831.48