Finding the Fourth Proportional to 778,559.46, 1,074,413.61 and 420,863.46

Step by Step Solution

1. Step 1: Write the proportion equation
   778,559.46 : 1,074,413.61 = 420,863.46 : x
2. Step 2: Convert to fraction form
   778,559.46/1,074,413.61 = 420,863.46/x
3. Step 3: Cross multiply
   778,559.46x = 1,074,413.61 × 420,863.46
4. Step 4: Simplify right side
   778,559.46x = 452,181,429,375.69
5. Step 5: Solve for x
   x = 452,181,429,375.69/778,559.46
6. Step 6: Final answer
   x = 580,792.42