Finding the Third Proportional to 1,218,986 and 1,859,419

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,986 : 1,859,419 = 1,859,419 : x
2. Step 2: Convert to fraction form
   1,218,986/1,859,419 = 1,859,419/x
3. Step 3: Cross multiply
   1,218,986x = 1,859,419 × 1,859,419
4. Step 4: Simplify right side
   1,218,986x = 3,457,439,017,561
5. Step 5: Solve for x
   x = 3,457,439,017,561/1,218,986
6. Step 6: Final answer
   x = 2,836,323.81