Finding the Fourth Proportional to 10,896.36, 16,347.38 and 3,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,896.36 : 16,347.38 = 3,105.78 : x
2. Step 2: Convert to fraction form
   10,896.36/16,347.38 = 3,105.78/x
3. Step 3: Cross multiply
   10,896.36x = 16,347.38 × 3,105.78
4. Step 4: Simplify right side
   10,896.36x = 50,771,365.86
5. Step 5: Solve for x
   x = 50,771,365.86/10,896.36
6. Step 6: Final answer
   x = 4,659.48