Finding the Third Proportional to 1,390.92 and 3,018.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390.92 : 3,018.09 = 3,018.09 : x
2. Step 2: Convert to fraction form
   1,390.92/3,018.09 = 3,018.09/x
3. Step 3: Cross multiply
   1,390.92x = 3,018.09 × 3,018.09
4. Step 4: Simplify right side
   1,390.92x = 9,108,889.88
5. Step 5: Solve for x
   x = 9,108,889.88/1,390.92
6. Step 6: Final answer
   x = 6,548.81