Finding the Fourth Proportional to 3,980.76, 5,976.56 and 2,745.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.76 : 5,976.56 = 2,745.12 : x
2. Step 2: Convert to fraction form
   3,980.76/5,976.56 = 2,745.12/x
3. Step 3: Cross multiply
   3,980.76x = 5,976.56 × 2,745.12
4. Step 4: Simplify right side
   3,980.76x = 16,406,374.39
5. Step 5: Solve for x
   x = 16,406,374.39/3,980.76
6. Step 6: Final answer
   x = 4,121.42