Finding the Fourth Proportional to 20,028.37, 30,039.94 and 5,238.43

Step by Step Solution

1. Step 1: Write the proportion equation
   20,028.37 : 30,039.94 = 5,238.43 : x
2. Step 2: Convert to fraction form
   20,028.37/30,039.94 = 5,238.43/x
3. Step 3: Cross multiply
   20,028.37x = 30,039.94 × 5,238.43
4. Step 4: Simplify right side
   20,028.37x = 157,362,034.70
5. Step 5: Solve for x
   x = 157,362,034.70/20,028.37
6. Step 6: Final answer
   x = 7,856.96