Finding the Fourth Proportional to 19,287.96, 28,902.17 and 13,023.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,287.96 : 28,902.17 = 13,023.42 : x
2. Step 2: Convert to fraction form
   19,287.96/28,902.17 = 13,023.42/x
3. Step 3: Cross multiply
   19,287.96x = 28,902.17 × 13,023.42
4. Step 4: Simplify right side
   19,287.96x = 376,405,131.38
5. Step 5: Solve for x
   x = 376,405,131.38/19,287.96
6. Step 6: Final answer
   x = 19,515.03