Finding the Fourth Proportional to 13,040.69, 19,557.84 and 7,111.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,040.69 : 19,557.84 = 7,111.18 : x
2. Step 2: Convert to fraction form
   13,040.69/19,557.84 = 7,111.18/x
3. Step 3: Cross multiply
   13,040.69x = 19,557.84 × 7,111.18
4. Step 4: Simplify right side
   13,040.69x = 139,079,285.10
5. Step 5: Solve for x
   x = 139,079,285.10/13,040.69
6. Step 6: Final answer
   x = 10,665.03