Finding the Fourth Proportional to 1,208,413.77, 1,667,653.83 and 664,591.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,413.77 : 1,667,653.83 = 664,591.61 : x
2. Step 2: Convert to fraction form
   1,208,413.77/1,667,653.83 = 664,591.61/x
3. Step 3: Cross multiply
   1,208,413.77x = 1,667,653.83 × 664,591.61
4. Step 4: Simplify right side
   1,208,413.77x = 1,108,308,735,464.10
5. Step 5: Solve for x
   x = 1,108,308,735,464.10/1,208,413.77
6. Step 6: Final answer
   x = 917,159.97