Finding the Third Proportional to 13,870 and 28,256

Step by Step Solution

1. Step 1: Write the proportion equation
   13,870 : 28,256 = 28,256 : x
2. Step 2: Convert to fraction form
   13,870/28,256 = 28,256/x
3. Step 3: Cross multiply
   13,870x = 28,256 × 28,256
4. Step 4: Simplify right side
   13,870x = 798,401,536
5. Step 5: Solve for x
   x = 798,401,536/13,870
6. Step 6: Final answer
   x = 57,563.20