Finding the Third Proportional to 2,143,790 and 3,412,485

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,790 : 3,412,485 = 3,412,485 : x
2. Step 2: Convert to fraction form
   2,143,790/3,412,485 = 3,412,485/x
3. Step 3: Cross multiply
   2,143,790x = 3,412,485 × 3,412,485
4. Step 4: Simplify right side
   2,143,790x = 11,645,053,875,225
5. Step 5: Solve for x
   x = 11,645,053,875,225/2,143,790
6. Step 6: Final answer
   x = 5,431,993.75