Finding the Third Proportional to 3,426.75 and 7,315.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.75 : 7,315.31 = 7,315.31 : x
2. Step 2: Convert to fraction form
   3,426.75/7,315.31 = 7,315.31/x
3. Step 3: Cross multiply
   3,426.75x = 7,315.31 × 7,315.31
4. Step 4: Simplify right side
   3,426.75x = 53,513,796.97
5. Step 5: Solve for x
   x = 53,513,796.97/3,426.75
6. Step 6: Final answer
   x = 15,616.49