Finding the Third Proportional to 10,386 and 21,024

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386 : 21,024 = 21,024 : x
2. Step 2: Convert to fraction form
   10,386/21,024 = 21,024/x
3. Step 3: Cross multiply
   10,386x = 21,024 × 21,024
4. Step 4: Simplify right side
   10,386x = 442,008,576
5. Step 5: Solve for x
   x = 442,008,576/10,386
6. Step 6: Final answer
   x = 42,558.11