Finding the Third Proportional to 10,396.69 and 13,856.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,396.69 : 13,856.91 = 13,856.91 : x
2. Step 2: Convert to fraction form
   10,396.69/13,856.91 = 13,856.91/x
3. Step 3: Cross multiply
   10,396.69x = 13,856.91 × 13,856.91
4. Step 4: Simplify right side
   10,396.69x = 192,013,850.82
5. Step 5: Solve for x
   x = 192,013,850.82/10,396.69
6. Step 6: Final answer
   x = 18,468.75