Finding the Third Proportional to 2,730.66 and 5,818.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,730.66 : 5,818.78 = 5,818.78 : x
2. Step 2: Convert to fraction form
   2,730.66/5,818.78 = 5,818.78/x
3. Step 3: Cross multiply
   2,730.66x = 5,818.78 × 5,818.78
4. Step 4: Simplify right side
   2,730.66x = 33,858,215.24
5. Step 5: Solve for x
   x = 33,858,215.24/2,730.66
6. Step 6: Final answer
   x = 12,399.30