Finding the Fourth Proportional to 2,391.35, 3,589.19 and 1,005.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.35 : 3,589.19 = 1,005.71 : x
2. Step 2: Convert to fraction form
   2,391.35/3,589.19 = 1,005.71/x
3. Step 3: Cross multiply
   2,391.35x = 3,589.19 × 1,005.71
4. Step 4: Simplify right side
   2,391.35x = 3,609,661.30
5. Step 5: Solve for x
   x = 3,609,661.30/2,391.35
6. Step 6: Final answer
   x = 1,509.47