Finding the Third Proportional to 9,109.50 and 12,309

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.50 : 12,309 = 12,309 : x
2. Step 2: Convert to fraction form
   9,109.50/12,309 = 12,309/x
3. Step 3: Cross multiply
   9,109.50x = 12,309 × 12,309
4. Step 4: Simplify right side
   9,109.50x = 151,511,481
5. Step 5: Solve for x
   x = 151,511,481/9,109.50
6. Step 6: Final answer
   x = 16,632.25