Finding the Third Proportional to 3,997.69 and 5,490.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.69 : 5,490.28 = 5,490.28 : x
2. Step 2: Convert to fraction form
   3,997.69/5,490.28 = 5,490.28/x
3. Step 3: Cross multiply
   3,997.69x = 5,490.28 × 5,490.28
4. Step 4: Simplify right side
   3,997.69x = 30,143,188.20
5. Step 5: Solve for x
   x = 30,143,188.20/3,997.69
6. Step 6: Final answer
   x = 7,540.16