Finding the Third Proportional to 11,788 and 15,216

Step by Step Solution

1. Step 1: Write the proportion equation
   11,788 : 15,216 = 15,216 : x
2. Step 2: Convert to fraction form
   11,788/15,216 = 15,216/x
3. Step 3: Cross multiply
   11,788x = 15,216 × 15,216
4. Step 4: Simplify right side
   11,788x = 231,526,656
5. Step 5: Solve for x
   x = 231,526,656/11,788
6. Step 6: Final answer
   x = 19,640.88