Finding the Third Proportional to 10,909.69 and 14,385.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,909.69 : 14,385.09 = 14,385.09 : x
2. Step 2: Convert to fraction form
   10,909.69/14,385.09 = 14,385.09/x
3. Step 3: Cross multiply
   10,909.69x = 14,385.09 × 14,385.09
4. Step 4: Simplify right side
   10,909.69x = 206,930,922.20
5. Step 5: Solve for x
   x = 206,930,922.20/10,909.69
6. Step 6: Final answer
   x = 18,967.63