Finding the Fourth Proportional to 2,655.78, 3,983.69 and 1,012.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,655.78 : 3,983.69 = 1,012.49 : x
2. Step 2: Convert to fraction form
   2,655.78/3,983.69 = 1,012.49/x
3. Step 3: Cross multiply
   2,655.78x = 3,983.69 × 1,012.49
4. Step 4: Simplify right side
   2,655.78x = 4,033,458.78
5. Step 5: Solve for x
   x = 4,033,458.78/2,655.78
6. Step 6: Final answer
   x = 1,518.75