Finding the Fourth Proportional to 3,930.78, 5,425.74 and 2,518.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.78 : 5,425.74 = 2,518.27 : x
2. Step 2: Convert to fraction form
   3,930.78/5,425.74 = 2,518.27/x
3. Step 3: Cross multiply
   3,930.78x = 5,425.74 × 2,518.27
4. Step 4: Simplify right side
   3,930.78x = 13,663,478.27
5. Step 5: Solve for x
   x = 13,663,478.27/3,930.78
6. Step 6: Final answer
   x = 3,476.02