Finding the Third Proportional to 6,687.56 and 10,400.91

Step by Step Solution

1. Step 1: Write the proportion equation
   6,687.56 : 10,400.91 = 10,400.91 : x
2. Step 2: Convert to fraction form
   6,687.56/10,400.91 = 10,400.91/x
3. Step 3: Cross multiply
   6,687.56x = 10,400.91 × 10,400.91
4. Step 4: Simplify right side
   6,687.56x = 108,178,850.82
5. Step 5: Solve for x
   x = 108,178,850.82/6,687.56
6. Step 6: Final answer
   x = 16,176.13