Finding the Fourth Proportional to 404,731.05, 607,413.78 and 282,355.80

Step by Step Solution

1. Step 1: Write the proportion equation
   404,731.05 : 607,413.78 = 282,355.80 : x
2. Step 2: Convert to fraction form
   404,731.05/607,413.78 = 282,355.80/x
3. Step 3: Cross multiply
   404,731.05x = 607,413.78 × 282,355.80
4. Step 4: Simplify right side
   404,731.05x = 171,506,803,782.92
5. Step 5: Solve for x
   x = 171,506,803,782.92/404,731.05
6. Step 6: Final answer
   x = 423,754.99