Finding the Third Proportional to 10,990 and 17,030

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990 : 17,030 = 17,030 : x
2. Step 2: Convert to fraction form
   10,990/17,030 = 17,030/x
3. Step 3: Cross multiply
   10,990x = 17,030 × 17,030
4. Step 4: Simplify right side
   10,990x = 290,020,900
5. Step 5: Solve for x
   x = 290,020,900/10,990
6. Step 6: Final answer
   x = 26,389.53