Finding the Third Proportional to 8,321 and 12,157

Step by Step Solution

1. Step 1: Write the proportion equation
   8,321 : 12,157 = 12,157 : x
2. Step 2: Convert to fraction form
   8,321/12,157 = 12,157/x
3. Step 3: Cross multiply
   8,321x = 12,157 × 12,157
4. Step 4: Simplify right side
   8,321x = 147,792,649
5. Step 5: Solve for x
   x = 147,792,649/8,321
6. Step 6: Final answer
   x = 17,761.40