Finding the Third Proportional to 2,128,605 and 3,215,019

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,605 : 3,215,019 = 3,215,019 : x
2. Step 2: Convert to fraction form
   2,128,605/3,215,019 = 3,215,019/x
3. Step 3: Cross multiply
   2,128,605x = 3,215,019 × 3,215,019
4. Step 4: Simplify right side
   2,128,605x = 10,336,347,170,361
5. Step 5: Solve for x
   x = 10,336,347,170,361/2,128,605
6. Step 6: Final answer
   x = 4,855,925.44