Finding the Third Proportional to 3,078 and 5,520

Step by Step Solution

1. Step 1: Write the proportion equation
   3,078 : 5,520 = 5,520 : x
2. Step 2: Convert to fraction form
   3,078/5,520 = 5,520/x
3. Step 3: Cross multiply
   3,078x = 5,520 × 5,520
4. Step 4: Simplify right side
   3,078x = 30,470,400
5. Step 5: Solve for x
   x = 30,470,400/3,078
6. Step 6: Final answer
   x = 9,899.42