Finding the Fourth Proportional to 407,016.09, 561,716.71 and 225,786.42

Step by Step Solution

1. Step 1: Write the proportion equation
   407,016.09 : 561,716.71 = 225,786.42 : x
2. Step 2: Convert to fraction form
   407,016.09/561,716.71 = 225,786.42/x
3. Step 3: Cross multiply
   407,016.09x = 561,716.71 × 225,786.42
4. Step 4: Simplify right side
   407,016.09x = 126,828,005,005.08
5. Step 5: Solve for x
   x = 126,828,005,005.08/407,016.09
6. Step 6: Final answer
   x = 311,604.40