Finding the Third Proportional to 4,872 and 10,389

Step by Step Solution

1. Step 1: Write the proportion equation
   4,872 : 10,389 = 10,389 : x
2. Step 2: Convert to fraction form
   4,872/10,389 = 10,389/x
3. Step 3: Cross multiply
   4,872x = 10,389 × 10,389
4. Step 4: Simplify right side
   4,872x = 107,931,321
5. Step 5: Solve for x
   x = 107,931,321/4,872
6. Step 6: Final answer
   x = 22,153.39