Finding the Third Proportional to 6,687.56 and 10,209.38

Step by Step Solution

1. Step 1: Write the proportion equation
   6,687.56 : 10,209.38 = 10,209.38 : x
2. Step 2: Convert to fraction form
   6,687.56/10,209.38 = 10,209.38/x
3. Step 3: Cross multiply
   6,687.56x = 10,209.38 × 10,209.38
4. Step 4: Simplify right side
   6,687.56x = 104,231,337.89
5. Step 5: Solve for x
   x = 104,231,337.89/6,687.56
6. Step 6: Final answer
   x = 15,585.85