Finding the Third Proportional to 3,340.27 and 7,215.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,340.27 : 7,215.89 = 7,215.89 : x
2. Step 2: Convert to fraction form
   3,340.27/7,215.89 = 7,215.89/x
3. Step 3: Cross multiply
   3,340.27x = 7,215.89 × 7,215.89
4. Step 4: Simplify right side
   3,340.27x = 52,069,077.51
5. Step 5: Solve for x
   x = 52,069,077.51/3,340.27
6. Step 6: Final answer
   x = 15,588.30