Finding the Third Proportional to 5,070 and 10,388

Step by Step Solution

1. Step 1: Write the proportion equation
   5,070 : 10,388 = 10,388 : x
2. Step 2: Convert to fraction form
   5,070/10,388 = 10,388/x
3. Step 3: Cross multiply
   5,070x = 10,388 × 10,388
4. Step 4: Simplify right side
   5,070x = 107,910,544
5. Step 5: Solve for x
   x = 107,910,544/5,070
6. Step 6: Final answer
   x = 21,284.13