Finding the Third Proportional to 6,858 and 10,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,858 : 10,768.50 = 10,768.50 : x
2. Step 2: Convert to fraction form
   6,858/10,768.50 = 10,768.50/x
3. Step 3: Cross multiply
   6,858x = 10,768.50 × 10,768.50
4. Step 4: Simplify right side
   6,858x = 115,960,592.25
5. Step 5: Solve for x
   x = 115,960,592.25/6,858
6. Step 6: Final answer
   x = 16,908.81