Finding the Third Proportional to 1,405,946 and 2,128,636

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,946 : 2,128,636 = 2,128,636 : x
2. Step 2: Convert to fraction form
   1,405,946/2,128,636 = 2,128,636/x
3. Step 3: Cross multiply
   1,405,946x = 2,128,636 × 2,128,636
4. Step 4: Simplify right side
   1,405,946x = 4,531,091,220,496
5. Step 5: Solve for x
   x = 4,531,091,220,496/1,405,946
6. Step 6: Final answer
   x = 3,222,806.01