Finding the Third Proportional to 1,663,600 and 3,405,872

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663,600 : 3,405,872 = 3,405,872 : x
2. Step 2: Convert to fraction form
   1,663,600/3,405,872 = 3,405,872/x
3. Step 3: Cross multiply
   1,663,600x = 3,405,872 × 3,405,872
4. Step 4: Simplify right side
   1,663,600x = 11,599,964,080,384
5. Step 5: Solve for x
   x = 11,599,964,080,384/1,663,600
6. Step 6: Final answer
   x = 6,972,808.42