Finding the Fourth Proportional to 3,523.05, 5,285.12 and 1,057.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,523.05 : 5,285.12 = 1,057.59 : x
2. Step 2: Convert to fraction form
   3,523.05/5,285.12 = 1,057.59/x
3. Step 3: Cross multiply
   3,523.05x = 5,285.12 × 1,057.59
4. Step 4: Simplify right side
   3,523.05x = 5,589,484.77
5. Step 5: Solve for x
   x = 5,589,484.77/3,523.05
6. Step 6: Final answer
   x = 1,586.55