Finding the Fourth Proportional to 6,786.72, 10,177.20 and 2,105.52

Step by Step Solution

1. Step 1: Write the proportion equation
   6,786.72 : 10,177.20 = 2,105.52 : x
2. Step 2: Convert to fraction form
   6,786.72/10,177.20 = 2,105.52/x
3. Step 3: Cross multiply
   6,786.72x = 10,177.20 × 2,105.52
4. Step 4: Simplify right side
   6,786.72x = 21,428,298.14
5. Step 5: Solve for x
   x = 21,428,298.14/6,786.72
6. Step 6: Final answer
   x = 3,157.39