Finding the Fourth Proportional to 2,760.94, 3,810.81 and 1,921.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.94 : 3,810.81 = 1,921.78 : x
2. Step 2: Convert to fraction form
   2,760.94/3,810.81 = 1,921.78/x
3. Step 3: Cross multiply
   2,760.94x = 3,810.81 × 1,921.78
4. Step 4: Simplify right side
   2,760.94x = 7,323,538.44
5. Step 5: Solve for x
   x = 7,323,538.44/2,760.94
6. Step 6: Final answer
   x = 2,652.55