Finding the Third Proportional to 1,398.66 and 3,076.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.66 : 3,076.31 = 3,076.31 : x
2. Step 2: Convert to fraction form
   1,398.66/3,076.31 = 3,076.31/x
3. Step 3: Cross multiply
   1,398.66x = 3,076.31 × 3,076.31
4. Step 4: Simplify right side
   1,398.66x = 9,463,698.60
5. Step 5: Solve for x
   x = 9,463,698.60/1,398.66
6. Step 6: Final answer
   x = 6,766.28