Finding the Third Proportional to 1,209,622 and 1,991,770

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,622 : 1,991,770 = 1,991,770 : x
2. Step 2: Convert to fraction form
   1,209,622/1,991,770 = 1,991,770/x
3. Step 3: Cross multiply
   1,209,622x = 1,991,770 × 1,991,770
4. Step 4: Simplify right side
   1,209,622x = 3,967,147,732,900
5. Step 5: Solve for x
   x = 3,967,147,732,900/1,209,622
6. Step 6: Final answer
   x = 3,279,659.04