Finding the Third Proportional to 8,390 and 12,341

Step by Step Solution

1. Step 1: Write the proportion equation
   8,390 : 12,341 = 12,341 : x
2. Step 2: Convert to fraction form
   8,390/12,341 = 12,341/x
3. Step 3: Cross multiply
   8,390x = 12,341 × 12,341
4. Step 4: Simplify right side
   8,390x = 152,300,281
5. Step 5: Solve for x
   x = 152,300,281/8,390
6. Step 6: Final answer
   x = 18,152.60