Finding the Third Proportional to 15,336 and 16,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,336 : 16,390.69 = 16,390.69 : x
2. Step 2: Convert to fraction form
   15,336/16,390.69 = 16,390.69/x
3. Step 3: Cross multiply
   15,336x = 16,390.69 × 16,390.69
4. Step 4: Simplify right side
   15,336x = 268,654,636.72
5. Step 5: Solve for x
   x = 268,654,636.72/15,336
6. Step 6: Final answer
   x = 17,517.91