Finding the Third Proportional to 5,478 and 10,308

Step by Step Solution

1. Step 1: Write the proportion equation
   5,478 : 10,308 = 10,308 : x
2. Step 2: Convert to fraction form
   5,478/10,308 = 10,308/x
3. Step 3: Cross multiply
   5,478x = 10,308 × 10,308
4. Step 4: Simplify right side
   5,478x = 106,254,864
5. Step 5: Solve for x
   x = 106,254,864/5,478
6. Step 6: Final answer
   x = 19,396.65