Finding the Third Proportional to 12,917 and 28,255

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917 : 28,255 = 28,255 : x
2. Step 2: Convert to fraction form
   12,917/28,255 = 28,255/x
3. Step 3: Cross multiply
   12,917x = 28,255 × 28,255
4. Step 4: Simplify right side
   12,917x = 798,345,025
5. Step 5: Solve for x
   x = 798,345,025/12,917
6. Step 6: Final answer
   x = 61,805.76