Finding the Third Proportional to 13,639 and 20,010

Step by Step Solution

1. Step 1: Write the proportion equation
   13,639 : 20,010 = 20,010 : x
2. Step 2: Convert to fraction form
   13,639/20,010 = 20,010/x
3. Step 3: Cross multiply
   13,639x = 20,010 × 20,010
4. Step 4: Simplify right side
   13,639x = 400,400,100
5. Step 5: Solve for x
   x = 400,400,100/13,639
6. Step 6: Final answer
   x = 29,357.00