Finding the Third Proportional to 1,209,859 and 1,644,100

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,859 : 1,644,100 = 1,644,100 : x
2. Step 2: Convert to fraction form
   1,209,859/1,644,100 = 1,644,100/x
3. Step 3: Cross multiply
   1,209,859x = 1,644,100 × 1,644,100
4. Step 4: Simplify right side
   1,209,859x = 2,703,064,810,000
5. Step 5: Solve for x
   x = 2,703,064,810,000/1,209,859
6. Step 6: Final answer
   x = 2,234,198.21