Finding the Third Proportional to 8,439 and 13,010

Step by Step Solution

1. Step 1: Write the proportion equation
   8,439 : 13,010 = 13,010 : x
2. Step 2: Convert to fraction form
   8,439/13,010 = 13,010/x
3. Step 3: Cross multiply
   8,439x = 13,010 × 13,010
4. Step 4: Simplify right side
   8,439x = 169,260,100
5. Step 5: Solve for x
   x = 169,260,100/8,439
6. Step 6: Final answer
   x = 20,056.89