Finding the Fourth Proportional to 2,616.21, 3,919.18 and 1,518.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.21 : 3,919.18 = 1,518.27 : x
2. Step 2: Convert to fraction form
   2,616.21/3,919.18 = 1,518.27/x
3. Step 3: Cross multiply
   2,616.21x = 3,919.18 × 1,518.27
4. Step 4: Simplify right side
   2,616.21x = 5,950,373.42
5. Step 5: Solve for x
   x = 5,950,373.42/2,616.21
6. Step 6: Final answer
   x = 2,274.42