Finding the Fourth Proportional to 13,879.36, 19,157.52 and 7,914.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,879.36 : 19,157.52 = 7,914.28 : x
2. Step 2: Convert to fraction form
   13,879.36/19,157.52 = 7,914.28/x
3. Step 3: Cross multiply
   13,879.36x = 19,157.52 × 7,914.28
4. Step 4: Simplify right side
   13,879.36x = 151,617,977.39
5. Step 5: Solve for x
   x = 151,617,977.39/13,879.36
6. Step 6: Final answer
   x = 10,923.99