Finding the Third Proportional to 9,070 and 12,839

Step by Step Solution

1. Step 1: Write the proportion equation
   9,070 : 12,839 = 12,839 : x
2. Step 2: Convert to fraction form
   9,070/12,839 = 12,839/x
3. Step 3: Cross multiply
   9,070x = 12,839 × 12,839
4. Step 4: Simplify right side
   9,070x = 164,839,921
5. Step 5: Solve for x
   x = 164,839,921/9,070
6. Step 6: Final answer
   x = 18,174.19