Finding the Third Proportional to 15,784 and 17,256

Step by Step Solution

1. Step 1: Write the proportion equation
   15,784 : 17,256 = 17,256 : x
2. Step 2: Convert to fraction form
   15,784/17,256 = 17,256/x
3. Step 3: Cross multiply
   15,784x = 17,256 × 17,256
4. Step 4: Simplify right side
   15,784x = 297,769,536
5. Step 5: Solve for x
   x = 297,769,536/15,784
6. Step 6: Final answer
   x = 18,865.28