Finding the Third Proportional to 2,678.50 and 3,555

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.50 : 3,555 = 3,555 : x
2. Step 2: Convert to fraction form
   2,678.50/3,555 = 3,555/x
3. Step 3: Cross multiply
   2,678.50x = 3,555 × 3,555
4. Step 4: Simplify right side
   2,678.50x = 12,638,025
5. Step 5: Solve for x
   x = 12,638,025/2,678.50
6. Step 6: Final answer
   x = 4,718.32