Finding the Third Proportional to 1,218,288 and 1,785,864

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,288 : 1,785,864 = 1,785,864 : x
2. Step 2: Convert to fraction form
   1,218,288/1,785,864 = 1,785,864/x
3. Step 3: Cross multiply
   1,218,288x = 1,785,864 × 1,785,864
4. Step 4: Simplify right side
   1,218,288x = 3,189,310,226,496
5. Step 5: Solve for x
   x = 3,189,310,226,496/1,218,288
6. Step 6: Final answer
   x = 2,617,862.30