Finding the Fourth Proportional to 405,076.69, 559,005.83 and 235,321.75

Step by Step Solution

1. Step 1: Write the proportion equation
   405,076.69 : 559,005.83 = 235,321.75 : x
2. Step 2: Convert to fraction form
   405,076.69/559,005.83 = 235,321.75/x
3. Step 3: Cross multiply
   405,076.69x = 559,005.83 × 235,321.75
4. Step 4: Simplify right side
   405,076.69x = 131,546,229,366.59
5. Step 5: Solve for x
   x = 131,546,229,366.59/405,076.69
6. Step 6: Final answer
   x = 324,744.01