Finding the Third Proportional to 4,234 and 10,990

Step by Step Solution

1. Step 1: Write the proportion equation
   4,234 : 10,990 = 10,990 : x
2. Step 2: Convert to fraction form
   4,234/10,990 = 10,990/x
3. Step 3: Cross multiply
   4,234x = 10,990 × 10,990
4. Step 4: Simplify right side
   4,234x = 120,780,100
5. Step 5: Solve for x
   x = 120,780,100/4,234
6. Step 6: Final answer
   x = 28,526.24