Finding the Third Proportional to 9,174 and 21,399

Step by Step Solution

1. Step 1: Write the proportion equation
   9,174 : 21,399 = 21,399 : x
2. Step 2: Convert to fraction form
   9,174/21,399 = 21,399/x
3. Step 3: Cross multiply
   9,174x = 21,399 × 21,399
4. Step 4: Simplify right side
   9,174x = 457,917,201
5. Step 5: Solve for x
   x = 457,917,201/9,174
6. Step 6: Final answer
   x = 49,914.67