Finding the Third Proportional to 1,211,028 and 1,645,405

Step by Step Solution

1. Step 1: Write the proportion equation
   1,211,028 : 1,645,405 = 1,645,405 : x
2. Step 2: Convert to fraction form
   1,211,028/1,645,405 = 1,645,405/x
3. Step 3: Cross multiply
   1,211,028x = 1,645,405 × 1,645,405
4. Step 4: Simplify right side
   1,211,028x = 2,707,357,614,025
5. Step 5: Solve for x
   x = 2,707,357,614,025/1,211,028
6. Step 6: Final answer
   x = 2,235,586.31