Finding the Third Proportional to 15,392 and 21,800

Step by Step Solution

1. Step 1: Write the proportion equation
   15,392 : 21,800 = 21,800 : x
2. Step 2: Convert to fraction form
   15,392/21,800 = 21,800/x
3. Step 3: Cross multiply
   15,392x = 21,800 × 21,800
4. Step 4: Simplify right side
   15,392x = 475,240,000
5. Step 5: Solve for x
   x = 475,240,000/15,392
6. Step 6: Final answer
   x = 30,875.78