Finding the Third Proportional to 9,556.50 and 12,906.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,556.50 : 12,906.75 = 12,906.75 : x
2. Step 2: Convert to fraction form
   9,556.50/12,906.75 = 12,906.75/x
3. Step 3: Cross multiply
   9,556.50x = 12,906.75 × 12,906.75
4. Step 4: Simplify right side
   9,556.50x = 166,584,195.56
5. Step 5: Solve for x
   x = 166,584,195.56/9,556.50
6. Step 6: Final answer
   x = 17,431.51