Finding the Third Proportional to 1,405,926 and 2,128,606

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,926 : 2,128,606 = 2,128,606 : x
2. Step 2: Convert to fraction form
   1,405,926/2,128,606 = 2,128,606/x
3. Step 3: Cross multiply
   1,405,926x = 2,128,606 × 2,128,606
4. Step 4: Simplify right side
   1,405,926x = 4,530,963,503,236
5. Step 5: Solve for x
   x = 4,530,963,503,236/1,405,926
6. Step 6: Final answer
   x = 3,222,761.02