Finding the Third Proportional to 9,155 and 13,399

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155 : 13,399 = 13,399 : x
2. Step 2: Convert to fraction form
   9,155/13,399 = 13,399/x
3. Step 3: Cross multiply
   9,155x = 13,399 × 13,399
4. Step 4: Simplify right side
   9,155x = 179,533,201
5. Step 5: Solve for x
   x = 179,533,201/9,155
6. Step 6: Final answer
   x = 19,610.40