Finding the Third Proportional to 8,740 and 12,359

Step by Step Solution

1. Step 1: Write the proportion equation
   8,740 : 12,359 = 12,359 : x
2. Step 2: Convert to fraction form
   8,740/12,359 = 12,359/x
3. Step 3: Cross multiply
   8,740x = 12,359 × 12,359
4. Step 4: Simplify right side
   8,740x = 152,744,881
5. Step 5: Solve for x
   x = 152,744,881/8,740
6. Step 6: Final answer
   x = 17,476.53