Finding the Third Proportional to 10,208 and 20,917

Step by Step Solution

1. Step 1: Write the proportion equation
   10,208 : 20,917 = 20,917 : x
2. Step 2: Convert to fraction form
   10,208/20,917 = 20,917/x
3. Step 3: Cross multiply
   10,208x = 20,917 × 20,917
4. Step 4: Simplify right side
   10,208x = 437,520,889
5. Step 5: Solve for x
   x = 437,520,889/10,208
6. Step 6: Final answer
   x = 42,860.59