Finding the Fourth Proportional to 3,520.21, 5,282.15 and 2,554.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.21 : 5,282.15 = 2,554.28 : x
2. Step 2: Convert to fraction form
   3,520.21/5,282.15 = 2,554.28/x
3. Step 3: Cross multiply
   3,520.21x = 5,282.15 × 2,554.28
4. Step 4: Simplify right side
   3,520.21x = 13,492,090.10
5. Step 5: Solve for x
   x = 13,492,090.10/3,520.21
6. Step 6: Final answer
   x = 3,832.75