Finding the Fourth Proportional to 3,851.60, 5,315.24 and 2,257.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.60 : 5,315.24 = 2,257.89 : x
2. Step 2: Convert to fraction form
   3,851.60/5,315.24 = 2,257.89/x
3. Step 3: Cross multiply
   3,851.60x = 5,315.24 × 2,257.89
4. Step 4: Simplify right side
   3,851.60x = 12,001,215.95
5. Step 5: Solve for x
   x = 12,001,215.95/3,851.60
6. Step 6: Final answer
   x = 3,115.91