Finding the Third Proportional to 15,122 and 17,900

Step by Step Solution

1. Step 1: Write the proportion equation
   15,122 : 17,900 = 17,900 : x
2. Step 2: Convert to fraction form
   15,122/17,900 = 17,900/x
3. Step 3: Cross multiply
   15,122x = 17,900 × 17,900
4. Step 4: Simplify right side
   15,122x = 320,410,000
5. Step 5: Solve for x
   x = 320,410,000/15,122
6. Step 6: Final answer
   x = 21,188.33