Finding the Fourth Proportional to 405,414.56, 559,520.76 and 235,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   405,414.56 : 559,520.76 = 235,648.72 : x
2. Step 2: Convert to fraction form
   405,414.56/559,520.76 = 235,648.72/x
3. Step 3: Cross multiply
   405,414.56x = 559,520.76 × 235,648.72
4. Step 4: Simplify right side
   405,414.56x = 131,850,350,907.43
5. Step 5: Solve for x
   x = 131,850,350,907.43/405,414.56
6. Step 6: Final answer
   x = 325,223.52