Finding the Third Proportional to 2,640.09 and 5,803.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.09 : 5,803.31 = 5,803.31 : x
2. Step 2: Convert to fraction form
   2,640.09/5,803.31 = 5,803.31/x
3. Step 3: Cross multiply
   2,640.09x = 5,803.31 × 5,803.31
4. Step 4: Simplify right side
   2,640.09x = 33,678,435.97
5. Step 5: Solve for x
   x = 33,678,435.97/2,640.09
6. Step 6: Final answer
   x = 12,756.53