Finding the Third Proportional to 3,858 and 10,455

Step by Step Solution

1. Step 1: Write the proportion equation
   3,858 : 10,455 = 10,455 : x
2. Step 2: Convert to fraction form
   3,858/10,455 = 10,455/x
3. Step 3: Cross multiply
   3,858x = 10,455 × 10,455
4. Step 4: Simplify right side
   3,858x = 109,307,025
5. Step 5: Solve for x
   x = 109,307,025/3,858
6. Step 6: Final answer
   x = 28,332.56