Finding the Fourth Proportional to 2,750.78, 4,127.52 and 1,290.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,750.78 : 4,127.52 = 1,290.04 : x
2. Step 2: Convert to fraction form
   2,750.78/4,127.52 = 1,290.04/x
3. Step 3: Cross multiply
   2,750.78x = 4,127.52 × 1,290.04
4. Step 4: Simplify right side
   2,750.78x = 5,324,665.90
5. Step 5: Solve for x
   x = 5,324,665.90/2,750.78
6. Step 6: Final answer
   x = 1,935.69