Finding the Fourth Proportional to 13,847.09, 19,109.69 and 7,879.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,847.09 : 19,109.69 = 7,879.61 : x
2. Step 2: Convert to fraction form
   13,847.09/19,109.69 = 7,879.61/x
3. Step 3: Cross multiply
   13,847.09x = 19,109.69 × 7,879.61
4. Step 4: Simplify right side
   13,847.09x = 150,576,769.47
5. Step 5: Solve for x
   x = 150,576,769.47/13,847.09
6. Step 6: Final answer
   x = 10,874.26