Finding the Third Proportional to 13,663.69 and 16,215.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,663.69 : 16,215.19 = 16,215.19 : x
2. Step 2: Convert to fraction form
   13,663.69/16,215.19 = 16,215.19/x
3. Step 3: Cross multiply
   13,663.69x = 16,215.19 × 16,215.19
4. Step 4: Simplify right side
   13,663.69x = 262,932,305.66
5. Step 5: Solve for x
   x = 262,932,305.66/13,663.69
6. Step 6: Final answer
   x = 19,243.14