Finding the Third Proportional to 8,458 and 12,181

Step by Step Solution

1. Step 1: Write the proportion equation
   8,458 : 12,181 = 12,181 : x
2. Step 2: Convert to fraction form
   8,458/12,181 = 12,181/x
3. Step 3: Cross multiply
   8,458x = 12,181 × 12,181
4. Step 4: Simplify right side
   8,458x = 148,376,761
5. Step 5: Solve for x
   x = 148,376,761/8,458
6. Step 6: Final answer
   x = 17,542.77