Finding the Fourth Proportional to 3,522.71, 5,284.94 and 1,057.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,522.71 : 5,284.94 = 1,057.57 : x
2. Step 2: Convert to fraction form
   3,522.71/5,284.94 = 1,057.57/x
3. Step 3: Cross multiply
   3,522.71x = 5,284.94 × 1,057.57
4. Step 4: Simplify right side
   3,522.71x = 5,589,188.71
5. Step 5: Solve for x
   x = 5,589,188.71/3,522.71
6. Step 6: Final answer
   x = 1,586.62