Finding the Third Proportional to 13,361 and 21,156

Step by Step Solution

1. Step 1: Write the proportion equation
   13,361 : 21,156 = 21,156 : x
2. Step 2: Convert to fraction form
   13,361/21,156 = 21,156/x
3. Step 3: Cross multiply
   13,361x = 21,156 × 21,156
4. Step 4: Simplify right side
   13,361x = 447,576,336
5. Step 5: Solve for x
   x = 447,576,336/13,361
6. Step 6: Final answer
   x = 33,498.72