Finding the Third Proportional to 1,405,942 and 2,128,630

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,942 : 2,128,630 = 2,128,630 : x
2. Step 2: Convert to fraction form
   1,405,942/2,128,630 = 2,128,630/x
3. Step 3: Cross multiply
   1,405,942x = 2,128,630 × 2,128,630
4. Step 4: Simplify right side
   1,405,942x = 4,531,065,676,900
5. Step 5: Solve for x
   x = 4,531,065,676,900/1,405,942
6. Step 6: Final answer
   x = 3,222,797.01