Finding the Third Proportional to 15,108 and 17,886

Step by Step Solution

1. Step 1: Write the proportion equation
   15,108 : 17,886 = 17,886 : x
2. Step 2: Convert to fraction form
   15,108/17,886 = 17,886/x
3. Step 3: Cross multiply
   15,108x = 17,886 × 17,886
4. Step 4: Simplify right side
   15,108x = 319,908,996
5. Step 5: Solve for x
   x = 319,908,996/15,108
6. Step 6: Final answer
   x = 21,174.81