Finding the Third Proportional to 11,917 and 25,418

Step by Step Solution

1. Step 1: Write the proportion equation
   11,917 : 25,418 = 25,418 : x
2. Step 2: Convert to fraction form
   11,917/25,418 = 25,418/x
3. Step 3: Cross multiply
   11,917x = 25,418 × 25,418
4. Step 4: Simplify right side
   11,917x = 646,074,724
5. Step 5: Solve for x
   x = 646,074,724/11,917
6. Step 6: Final answer
   x = 54,214.54