Finding the Fourth Proportional to 564,067.50, 778,413.15 and 309,419.30

Step by Step Solution

1. Step 1: Write the proportion equation
   564,067.50 : 778,413.15 = 309,419.30 : x
2. Step 2: Convert to fraction form
   564,067.50/778,413.15 = 309,419.30/x
3. Step 3: Cross multiply
   564,067.50x = 778,413.15 × 309,419.30
4. Step 4: Simplify right side
   564,067.50x = 240,856,048,091.73
5. Step 5: Solve for x
   x = 240,856,048,091.73/564,067.50
6. Step 6: Final answer
   x = 426,998.63