Finding the Fourth Proportional to 20,271, 30,408.12 and 7,126.32

Step by Step Solution

1. Step 1: Write the proportion equation
   20,271 : 30,408.12 = 7,126.32 : x
2. Step 2: Convert to fraction form
   20,271/30,408.12 = 7,126.32/x
3. Step 3: Cross multiply
   20,271x = 30,408.12 × 7,126.32
4. Step 4: Simplify right side
   20,271x = 216,697,993.72
5. Step 5: Solve for x
   x = 216,697,993.72/20,271
6. Step 6: Final answer
   x = 10,690.05