Finding the Third Proportional to 8,615 and 12,922

Step by Step Solution

1. Step 1: Write the proportion equation
   8,615 : 12,922 = 12,922 : x
2. Step 2: Convert to fraction form
   8,615/12,922 = 12,922/x
3. Step 3: Cross multiply
   8,615x = 12,922 × 12,922
4. Step 4: Simplify right side
   8,615x = 166,978,084
5. Step 5: Solve for x
   x = 166,978,084/8,615
6. Step 6: Final answer
   x = 19,382.25