Finding the Fourth Proportional to 496,441.59, 685,067.76 and 275,665.19

Step by Step Solution

1. Step 1: Write the proportion equation
   496,441.59 : 685,067.76 = 275,665.19 : x
2. Step 2: Convert to fraction form
   496,441.59/685,067.76 = 275,665.19/x
3. Step 3: Cross multiply
   496,441.59x = 685,067.76 × 275,665.19
4. Step 4: Simplify right side
   496,441.59x = 188,849,329,419.61
5. Step 5: Solve for x
   x = 188,849,329,419.61/496,441.59
6. Step 6: Final answer
   x = 380,405.94