Finding the Fourth Proportional to 3,976.80, 5,488.71 and 2,297.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.80 : 5,488.71 = 2,297.98 : x
2. Step 2: Convert to fraction form
   3,976.80/5,488.71 = 2,297.98/x
3. Step 3: Cross multiply
   3,976.80x = 5,488.71 × 2,297.98
4. Step 4: Simplify right side
   3,976.80x = 12,612,945.81
5. Step 5: Solve for x
   x = 12,612,945.81/3,976.80
6. Step 6: Final answer
   x = 3,171.63