Finding the Third Proportional to 8,830 and 12,907

Step by Step Solution

1. Step 1: Write the proportion equation
   8,830 : 12,907 = 12,907 : x
2. Step 2: Convert to fraction form
   8,830/12,907 = 12,907/x
3. Step 3: Cross multiply
   8,830x = 12,907 × 12,907
4. Step 4: Simplify right side
   8,830x = 166,590,649
5. Step 5: Solve for x
   x = 166,590,649/8,830
6. Step 6: Final answer
   x = 18,866.44