Finding the Fourth Proportional to 3,786.86, 5,680.37 and 1,013.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.86 : 5,680.37 = 1,013.53 : x
2. Step 2: Convert to fraction form
   3,786.86/5,680.37 = 1,013.53/x
3. Step 3: Cross multiply
   3,786.86x = 5,680.37 × 1,013.53
4. Step 4: Simplify right side
   3,786.86x = 5,757,235.04
5. Step 5: Solve for x
   x = 5,757,235.04/3,786.86
6. Step 6: Final answer
   x = 1,520.32