Finding the Third Proportional to 1,818.56 and 3,960.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.56 : 3,960.56 = 3,960.56 : x
2. Step 2: Convert to fraction form
   1,818.56/3,960.56 = 3,960.56/x
3. Step 3: Cross multiply
   1,818.56x = 3,960.56 × 3,960.56
4. Step 4: Simplify right side
   1,818.56x = 15,686,055.32
5. Step 5: Solve for x
   x = 15,686,055.32/1,818.56
6. Step 6: Final answer
   x = 8,625.52