Finding the Third Proportional to 1,663,661 and 3,405,993

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663,661 : 3,405,993 = 3,405,993 : x
2. Step 2: Convert to fraction form
   1,663,661/3,405,993 = 3,405,993/x
3. Step 3: Cross multiply
   1,663,661x = 3,405,993 × 3,405,993
4. Step 4: Simplify right side
   1,663,661x = 11,600,788,316,049
5. Step 5: Solve for x
   x = 11,600,788,316,049/1,663,661
6. Step 6: Final answer
   x = 6,973,048.18