Finding the Third Proportional to 1,345,398 and 1,998,921

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345,398 : 1,998,921 = 1,998,921 : x
2. Step 2: Convert to fraction form
   1,345,398/1,998,921 = 1,998,921/x
3. Step 3: Cross multiply
   1,345,398x = 1,998,921 × 1,998,921
4. Step 4: Simplify right side
   1,345,398x = 3,995,685,164,241
5. Step 5: Solve for x
   x = 3,995,685,164,241/1,345,398
6. Step 6: Final answer
   x = 2,969,890.82