Finding the Fourth Proportional to 20,019.76, 30,019.42 and 6,687.96

Step by Step Solution

1. Step 1: Write the proportion equation
   20,019.76 : 30,019.42 = 6,687.96 : x
2. Step 2: Convert to fraction form
   20,019.76/30,019.42 = 6,687.96/x
3. Step 3: Cross multiply
   20,019.76x = 30,019.42 × 6,687.96
4. Step 4: Simplify right side
   20,019.76x = 200,768,680.18
5. Step 5: Solve for x
   x = 200,768,680.18/20,019.76
6. Step 6: Final answer
   x = 10,028.53