Finding the Fourth Proportional to 4,820.78, 7,219.31 and 3,982.71

Step by Step Solution

1. Step 1: Write the proportion equation
   4,820.78 : 7,219.31 = 3,982.71 : x
2. Step 2: Convert to fraction form
   4,820.78/7,219.31 = 3,982.71/x
3. Step 3: Cross multiply
   4,820.78x = 7,219.31 × 3,982.71
4. Step 4: Simplify right side
   4,820.78x = 28,752,418.13
5. Step 5: Solve for x
   x = 28,752,418.13/4,820.78
6. Step 6: Final answer
   x = 5,964.27