Finding the Fourth Proportional to 1,196.15, 1,794.72 and 647.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.15 : 1,794.72 = 647.69 : x
2. Step 2: Convert to fraction form
   1,196.15/1,794.72 = 647.69/x
3. Step 3: Cross multiply
   1,196.15x = 1,794.72 × 647.69
4. Step 4: Simplify right side
   1,196.15x = 1,162,413.22
5. Step 5: Solve for x
   x = 1,162,413.22/1,196.15
6. Step 6: Final answer
   x = 971.80