Finding the Third Proportional to 11,388 and 20,916

Step by Step Solution

1. Step 1: Write the proportion equation
   11,388 : 20,916 = 20,916 : x
2. Step 2: Convert to fraction form
   11,388/20,916 = 20,916/x
3. Step 3: Cross multiply
   11,388x = 20,916 × 20,916
4. Step 4: Simplify right side
   11,388x = 437,479,056
5. Step 5: Solve for x
   x = 437,479,056/11,388
6. Step 6: Final answer
   x = 38,415.79