Finding the Third Proportional to 13,328 and 21,180

Step by Step Solution

1. Step 1: Write the proportion equation
   13,328 : 21,180 = 21,180 : x
2. Step 2: Convert to fraction form
   13,328/21,180 = 21,180/x
3. Step 3: Cross multiply
   13,328x = 21,180 × 21,180
4. Step 4: Simplify right side
   13,328x = 448,592,400
5. Step 5: Solve for x
   x = 448,592,400/13,328
6. Step 6: Final answer
   x = 33,657.89