Finding the Third Proportional to 5,087 and 10,423

Step by Step Solution

1. Step 1: Write the proportion equation
   5,087 : 10,423 = 10,423 : x
2. Step 2: Convert to fraction form
   5,087/10,423 = 10,423/x
3. Step 3: Cross multiply
   5,087x = 10,423 × 10,423
4. Step 4: Simplify right side
   5,087x = 108,638,929
5. Step 5: Solve for x
   x = 108,638,929/5,087
6. Step 6: Final answer
   x = 21,356.19