Finding the Third Proportional to 9,240 and 13,089

Step by Step Solution

1. Step 1: Write the proportion equation
   9,240 : 13,089 = 13,089 : x
2. Step 2: Convert to fraction form
   9,240/13,089 = 13,089/x
3. Step 3: Cross multiply
   9,240x = 13,089 × 13,089
4. Step 4: Simplify right side
   9,240x = 171,321,921
5. Step 5: Solve for x
   x = 171,321,921/9,240
6. Step 6: Final answer
   x = 18,541.33