Finding the Fourth Proportional to 10,118.56, 13,974.42 and 9,019.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,118.56 : 13,974.42 = 9,019.12 : x
2. Step 2: Convert to fraction form
   10,118.56/13,974.42 = 9,019.12/x
3. Step 3: Cross multiply
   10,118.56x = 13,974.42 × 9,019.12
4. Step 4: Simplify right side
   10,118.56x = 126,036,970.91
5. Step 5: Solve for x
   x = 126,036,970.91/10,118.56
6. Step 6: Final answer
   x = 12,456.02