Finding the Third Proportional to 17,908 and 21,148

Step by Step Solution

1. Step 1: Write the proportion equation
   17,908 : 21,148 = 21,148 : x
2. Step 2: Convert to fraction form
   17,908/21,148 = 21,148/x
3. Step 3: Cross multiply
   17,908x = 21,148 × 21,148
4. Step 4: Simplify right side
   17,908x = 447,237,904
5. Step 5: Solve for x
   x = 447,237,904/17,908
6. Step 6: Final answer
   x = 24,974.20