Finding the Third Proportional to 1,405,996 and 2,178,906

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,996 : 2,178,906 = 2,178,906 : x
2. Step 2: Convert to fraction form
   1,405,996/2,178,906 = 2,178,906/x
3. Step 3: Cross multiply
   1,405,996x = 2,178,906 × 2,178,906
4. Step 4: Simplify right side
   1,405,996x = 4,747,631,356,836
5. Step 5: Solve for x
   x = 4,747,631,356,836/1,405,996
6. Step 6: Final answer
   x = 3,376,703.32