Finding the Third Proportional to 5,085 and 10,404

Step by Step Solution

1. Step 1: Write the proportion equation
   5,085 : 10,404 = 10,404 : x
2. Step 2: Convert to fraction form
   5,085/10,404 = 10,404/x
3. Step 3: Cross multiply
   5,085x = 10,404 × 10,404
4. Step 4: Simplify right side
   5,085x = 108,243,216
5. Step 5: Solve for x
   x = 108,243,216/5,085
6. Step 6: Final answer
   x = 21,286.77