Finding the Third Proportional to 10,187.25 and 21,009

Step by Step Solution

1. Step 1: Write the proportion equation
   10,187.25 : 21,009 = 21,009 : x
2. Step 2: Convert to fraction form
   10,187.25/21,009 = 21,009/x
3. Step 3: Cross multiply
   10,187.25x = 21,009 × 21,009
4. Step 4: Simplify right side
   10,187.25x = 441,378,081
5. Step 5: Solve for x
   x = 441,378,081/10,187.25
6. Step 6: Final answer
   x = 43,326.52