Finding the Fourth Proportional to 2,656.78, 3,984.25 and 1,013.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.78 : 3,984.25 = 1,013.79 : x
2. Step 2: Convert to fraction form
   2,656.78/3,984.25 = 1,013.79/x
3. Step 3: Cross multiply
   2,656.78x = 3,984.25 × 1,013.79
4. Step 4: Simplify right side
   2,656.78x = 4,039,190.27
5. Step 5: Solve for x
   x = 4,039,190.27/2,656.78
6. Step 6: Final answer
   x = 1,520.33