Finding the Fourth Proportional to 3,976.56, 5,934.78 and 3,872.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.56 : 5,934.78 = 3,872.88 : x
2. Step 2: Convert to fraction form
   3,976.56/5,934.78 = 3,872.88/x
3. Step 3: Cross multiply
   3,976.56x = 5,934.78 × 3,872.88
4. Step 4: Simplify right side
   3,976.56x = 22,984,690.77
5. Step 5: Solve for x
   x = 22,984,690.77/3,976.56
6. Step 6: Final answer
   x = 5,780.04