Finding the Fourth Proportional to 2,661.98, 3,995.76 and 1,276.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.98 : 3,995.76 = 1,276.49 : x
2. Step 2: Convert to fraction form
   2,661.98/3,995.76 = 1,276.49/x
3. Step 3: Cross multiply
   2,661.98x = 3,995.76 × 1,276.49
4. Step 4: Simplify right side
   2,661.98x = 5,100,547.68
5. Step 5: Solve for x
   x = 5,100,547.68/2,661.98
6. Step 6: Final answer
   x = 1,916.07