Finding the Fourth Proportional to 2,646.80, 3,960.84 and 1,951.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.80 : 3,960.84 = 1,951.82 : x
2. Step 2: Convert to fraction form
   2,646.80/3,960.84 = 1,951.82/x
3. Step 3: Cross multiply
   2,646.80x = 3,960.84 × 1,951.82
4. Step 4: Simplify right side
   2,646.80x = 7,730,846.73
5. Step 5: Solve for x
   x = 7,730,846.73/2,646.80
6. Step 6: Final answer
   x = 2,920.83