Finding the Third Proportional to 8,513 and 12,945

Step by Step Solution

1. Step 1: Write the proportion equation
   8,513 : 12,945 = 12,945 : x
2. Step 2: Convert to fraction form
   8,513/12,945 = 12,945/x
3. Step 3: Cross multiply
   8,513x = 12,945 × 12,945
4. Step 4: Simplify right side
   8,513x = 167,573,025
5. Step 5: Solve for x
   x = 167,573,025/8,513
6. Step 6: Final answer
   x = 19,684.37