Finding the Fourth Proportional to 3,898.89, 5,850.77 and 2,256.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,898.89 : 5,850.77 = 2,256.21 : x
2. Step 2: Convert to fraction form
   3,898.89/5,850.77 = 2,256.21/x
3. Step 3: Cross multiply
   3,898.89x = 5,850.77 × 2,256.21
4. Step 4: Simplify right side
   3,898.89x = 13,200,554.50
5. Step 5: Solve for x
   x = 13,200,554.50/3,898.89
6. Step 6: Final answer
   x = 3,385.72