Finding the Fourth Proportional to 405,436.16, 559,590.72 and 235,768.16

Step by Step Solution

1. Step 1: Write the proportion equation
   405,436.16 : 559,590.72 = 235,768.16 : x
2. Step 2: Convert to fraction form
   405,436.16/559,590.72 = 235,768.16/x
3. Step 3: Cross multiply
   405,436.16x = 559,590.72 × 235,768.16
4. Step 4: Simplify right side
   405,436.16x = 131,933,674,407.48
5. Step 5: Solve for x
   x = 131,933,674,407.48/405,436.16
6. Step 6: Final answer
   x = 325,411.71