Finding the Third Proportional to 8,911.50 and 13,860

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.50 : 13,860 = 13,860 : x
2. Step 2: Convert to fraction form
   8,911.50/13,860 = 13,860/x
3. Step 3: Cross multiply
   8,911.50x = 13,860 × 13,860
4. Step 4: Simplify right side
   8,911.50x = 192,099,600
5. Step 5: Solve for x
   x = 192,099,600/8,911.50
6. Step 6: Final answer
   x = 21,556.37