Finding the Third Proportional to 10,236 and 21,503

Step by Step Solution

1. Step 1: Write the proportion equation
   10,236 : 21,503 = 21,503 : x
2. Step 2: Convert to fraction form
   10,236/21,503 = 21,503/x
3. Step 3: Cross multiply
   10,236x = 21,503 × 21,503
4. Step 4: Simplify right side
   10,236x = 462,379,009
5. Step 5: Solve for x
   x = 462,379,009/10,236
6. Step 6: Final answer
   x = 45,171.85