Finding the Third Proportional to 11,196 and 21,828

Step by Step Solution

1. Step 1: Write the proportion equation
   11,196 : 21,828 = 21,828 : x
2. Step 2: Convert to fraction form
   11,196/21,828 = 21,828/x
3. Step 3: Cross multiply
   11,196x = 21,828 × 21,828
4. Step 4: Simplify right side
   11,196x = 476,461,584
5. Step 5: Solve for x
   x = 476,461,584/11,196
6. Step 6: Final answer
   x = 42,556.41