Finding the Third Proportional to 9,309.09 and 13,021.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,309.09 : 13,021.88 = 13,021.88 : x
2. Step 2: Convert to fraction form
   9,309.09/13,021.88 = 13,021.88/x
3. Step 3: Cross multiply
   9,309.09x = 13,021.88 × 13,021.88
4. Step 4: Simplify right side
   9,309.09x = 169,569,228.52
5. Step 5: Solve for x
   x = 169,569,228.52/9,309.09
6. Step 6: Final answer
   x = 18,215.44