Finding the Fourth Proportional to 404,326.65, 558,150.17 and 261,156.54

Step by Step Solution

1. Step 1: Write the proportion equation
   404,326.65 : 558,150.17 = 261,156.54 : x
2. Step 2: Convert to fraction form
   404,326.65/558,150.17 = 261,156.54/x
3. Step 3: Cross multiply
   404,326.65x = 558,150.17 × 261,156.54
4. Step 4: Simplify right side
   404,326.65x = 145,764,565,891.83
5. Step 5: Solve for x
   x = 145,764,565,891.83/404,326.65
6. Step 6: Final answer
   x = 360,511.89