Finding the Third Proportional to 10,259 and 21,391

Step by Step Solution

1. Step 1: Write the proportion equation
   10,259 : 21,391 = 21,391 : x
2. Step 2: Convert to fraction form
   10,259/21,391 = 21,391/x
3. Step 3: Cross multiply
   10,259x = 21,391 × 21,391
4. Step 4: Simplify right side
   10,259x = 457,574,881
5. Step 5: Solve for x
   x = 457,574,881/10,259
6. Step 6: Final answer
   x = 44,602.29