Finding the Third Proportional to 1,405,962 and 2,128,660

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,962 : 2,128,660 = 2,128,660 : x
2. Step 2: Convert to fraction form
   1,405,962/2,128,660 = 2,128,660/x
3. Step 3: Cross multiply
   1,405,962x = 2,128,660 × 2,128,660
4. Step 4: Simplify right side
   1,405,962x = 4,531,193,395,600
5. Step 5: Solve for x
   x = 4,531,193,395,600/1,405,962
6. Step 6: Final answer
   x = 3,222,842.01