Finding the Third Proportional to 3,405.80 and 7,210.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.80 : 7,210.27 = 7,210.27 : x
2. Step 2: Convert to fraction form
   3,405.80/7,210.27 = 7,210.27/x
3. Step 3: Cross multiply
   3,405.80x = 7,210.27 × 7,210.27
4. Step 4: Simplify right side
   3,405.80x = 51,987,930.38
5. Step 5: Solve for x
   x = 51,987,930.38/3,405.80
6. Step 6: Final answer
   x = 15,264.54