Finding the Third Proportional to 9,510 and 21,917

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510 : 21,917 = 21,917 : x
2. Step 2: Convert to fraction form
   9,510/21,917 = 21,917/x
3. Step 3: Cross multiply
   9,510x = 21,917 × 21,917
4. Step 4: Simplify right side
   9,510x = 480,354,889
5. Step 5: Solve for x
   x = 480,354,889/9,510
6. Step 6: Final answer
   x = 50,510.50