Finding the Third Proportional to 1,405,938 and 2,128,624

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,938 : 2,128,624 = 2,128,624 : x
2. Step 2: Convert to fraction form
   1,405,938/2,128,624 = 2,128,624/x
3. Step 3: Cross multiply
   1,405,938x = 2,128,624 × 2,128,624
4. Step 4: Simplify right side
   1,405,938x = 4,531,040,133,376
5. Step 5: Solve for x
   x = 4,531,040,133,376/1,405,938
6. Step 6: Final answer
   x = 3,222,788.01