Finding the Third Proportional to 2,143,288 and 2,918,790

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,288 : 2,918,790 = 2,918,790 : x
2. Step 2: Convert to fraction form
   2,143,288/2,918,790 = 2,918,790/x
3. Step 3: Cross multiply
   2,143,288x = 2,918,790 × 2,918,790
4. Step 4: Simplify right side
   2,143,288x = 8,519,335,064,100
5. Step 5: Solve for x
   x = 8,519,335,064,100/2,143,288
6. Step 6: Final answer
   x = 3,974,890.48