Finding the Third Proportional to 9,158 and 13,731

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158 : 13,731 = 13,731 : x
2. Step 2: Convert to fraction form
   9,158/13,731 = 13,731/x
3. Step 3: Cross multiply
   9,158x = 13,731 × 13,731
4. Step 4: Simplify right side
   9,158x = 188,540,361
5. Step 5: Solve for x
   x = 188,540,361/9,158
6. Step 6: Final answer
   x = 20,587.50