Finding the Third Proportional to 2,143,290 and 2,918,793

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,290 : 2,918,793 = 2,918,793 : x
2. Step 2: Convert to fraction form
   2,143,290/2,918,793 = 2,918,793/x
3. Step 3: Cross multiply
   2,143,290x = 2,918,793 × 2,918,793
4. Step 4: Simplify right side
   2,143,290x = 8,519,352,576,849
5. Step 5: Solve for x
   x = 8,519,352,576,849/2,143,290
6. Step 6: Final answer
   x = 3,974,894.94