Finding the Third Proportional to 2,378 and 5,555

Step by Step Solution

1. Step 1: Write the proportion equation
   2,378 : 5,555 = 5,555 : x
2. Step 2: Convert to fraction form
   2,378/5,555 = 5,555/x
3. Step 3: Cross multiply
   2,378x = 5,555 × 5,555
4. Step 4: Simplify right side
   2,378x = 30,858,025
5. Step 5: Solve for x
   x = 30,858,025/2,378
6. Step 6: Final answer
   x = 12,976.46