Finding the Fourth Proportional to 13,798.78, 19,046.34 and 9,019.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,798.78 : 19,046.34 = 9,019.42 : x
2. Step 2: Convert to fraction form
   13,798.78/19,046.34 = 9,019.42/x
3. Step 3: Cross multiply
   13,798.78x = 19,046.34 × 9,019.42
4. Step 4: Simplify right side
   13,798.78x = 171,786,939.92
5. Step 5: Solve for x
   x = 171,786,939.92/13,798.78
6. Step 6: Final answer
   x = 12,449.43