Finding the Fourth Proportional to 641,086.72, 884,721.53 and 365,485.34

Step by Step Solution

1. Step 1: Write the proportion equation
   641,086.72 : 884,721.53 = 365,485.34 : x
2. Step 2: Convert to fraction form
   641,086.72/884,721.53 = 365,485.34/x
3. Step 3: Cross multiply
   641,086.72x = 884,721.53 × 365,485.34
4. Step 4: Simplify right side
   641,086.72x = 323,352,752,322.89
5. Step 5: Solve for x
   x = 323,352,752,322.89/641,086.72
6. Step 6: Final answer
   x = 504,382.24