Finding the Fourth Proportional to 3,522.57, 5,284.86 and 1,057.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,522.57 : 5,284.86 = 1,057.47 : x
2. Step 2: Convert to fraction form
   3,522.57/5,284.86 = 1,057.47/x
3. Step 3: Cross multiply
   3,522.57x = 5,284.86 × 1,057.47
4. Step 4: Simplify right side
   3,522.57x = 5,588,580.90
5. Step 5: Solve for x
   x = 5,588,580.90/3,522.57
6. Step 6: Final answer
   x = 1,586.51