Finding the Third Proportional to 3,916 and 7,040

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916 : 7,040 = 7,040 : x
2. Step 2: Convert to fraction form
   3,916/7,040 = 7,040/x
3. Step 3: Cross multiply
   3,916x = 7,040 × 7,040
4. Step 4: Simplify right side
   3,916x = 49,561,600
5. Step 5: Solve for x
   x = 49,561,600/3,916
6. Step 6: Final answer
   x = 12,656.18