Finding the Third Proportional to 2,128,618 and 3,215,043

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,618 : 3,215,043 = 3,215,043 : x
2. Step 2: Convert to fraction form
   2,128,618/3,215,043 = 3,215,043/x
3. Step 3: Cross multiply
   2,128,618x = 3,215,043 × 3,215,043
4. Step 4: Simplify right side
   2,128,618x = 10,336,501,491,849
5. Step 5: Solve for x
   x = 10,336,501,491,849/2,128,618
6. Step 6: Final answer
   x = 4,855,968.28