Finding the Fourth Proportional to 3,983.02, 5,978.85 and 2,518.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.02 : 5,978.85 = 2,518.54 : x
2. Step 2: Convert to fraction form
   3,983.02/5,978.85 = 2,518.54/x
3. Step 3: Cross multiply
   3,983.02x = 5,978.85 × 2,518.54
4. Step 4: Simplify right side
   3,983.02x = 15,057,972.88
5. Step 5: Solve for x
   x = 15,057,972.88/3,983.02
6. Step 6: Final answer
   x = 3,780.54