Finding the Fourth Proportional to 10,719.36, 16,078.56 and 2,928.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,719.36 : 16,078.56 = 2,928.18 : x
2. Step 2: Convert to fraction form
   10,719.36/16,078.56 = 2,928.18/x
3. Step 3: Cross multiply
   10,719.36x = 16,078.56 × 2,928.18
4. Step 4: Simplify right side
   10,719.36x = 47,080,917.82
5. Step 5: Solve for x
   x = 47,080,917.82/10,719.36
6. Step 6: Final answer
   x = 4,392.14