Finding the Fourth Proportional to 21,019.73, 31,529.45 and 6,228.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.73 : 31,529.45 = 6,228.72 : x
2. Step 2: Convert to fraction form
   21,019.73/31,529.45 = 6,228.72/x
3. Step 3: Cross multiply
   21,019.73x = 31,529.45 × 6,228.72
4. Step 4: Simplify right side
   21,019.73x = 196,388,131.38
5. Step 5: Solve for x
   x = 196,388,131.38/21,019.73
6. Step 6: Final answer
   x = 9,343.04