Finding the Third Proportional to 13,456 and 21,160

Step by Step Solution

1. Step 1: Write the proportion equation
   13,456 : 21,160 = 21,160 : x
2. Step 2: Convert to fraction form
   13,456/21,160 = 21,160/x
3. Step 3: Cross multiply
   13,456x = 21,160 × 21,160
4. Step 4: Simplify right side
   13,456x = 447,745,600
5. Step 5: Solve for x
   x = 447,745,600/13,456
6. Step 6: Final answer
   x = 33,274.79