Finding the Fourth Proportional to 19,020.09, 28,557.83 and 13,502.73

Step by Step Solution

1. Step 1: Write the proportion equation
   19,020.09 : 28,557.83 = 13,502.73 : x
2. Step 2: Convert to fraction form
   19,020.09/28,557.83 = 13,502.73/x
3. Step 3: Cross multiply
   19,020.09x = 28,557.83 × 13,502.73
4. Step 4: Simplify right side
   19,020.09x = 385,608,667.88
5. Step 5: Solve for x
   x = 385,608,667.88/19,020.09
6. Step 6: Final answer
   x = 20,273.76