Finding the Fourth Proportional to 3,365.88, 5,049.30 and 1,057.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,365.88 : 5,049.30 = 1,057.56 : x
2. Step 2: Convert to fraction form
   3,365.88/5,049.30 = 1,057.56/x
3. Step 3: Cross multiply
   3,365.88x = 5,049.30 × 1,057.56
4. Step 4: Simplify right side
   3,365.88x = 5,339,937.71
5. Step 5: Solve for x
   x = 5,339,937.71/3,365.88
6. Step 6: Final answer
   x = 1,586.49