Finding the Third Proportional to 11,148 and 21,729

Step by Step Solution

1. Step 1: Write the proportion equation
   11,148 : 21,729 = 21,729 : x
2. Step 2: Convert to fraction form
   11,148/21,729 = 21,729/x
3. Step 3: Cross multiply
   11,148x = 21,729 × 21,729
4. Step 4: Simplify right side
   11,148x = 472,149,441
5. Step 5: Solve for x
   x = 472,149,441/11,148
6. Step 6: Final answer
   x = 42,352.84