Finding the Third Proportional to 3,398.63 and 7,207.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,398.63 : 7,207.31 = 7,207.31 : x
2. Step 2: Convert to fraction form
   3,398.63/7,207.31 = 7,207.31/x
3. Step 3: Cross multiply
   3,398.63x = 7,207.31 × 7,207.31
4. Step 4: Simplify right side
   3,398.63x = 51,945,353.47
5. Step 5: Solve for x
   x = 51,945,353.47/3,398.63
6. Step 6: Final answer
   x = 15,284.23