Finding the Fourth Proportional to 2,379.15, 3,568.42 and 1,080.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.15 : 3,568.42 = 1,080.31 : x
2. Step 2: Convert to fraction form
   2,379.15/3,568.42 = 1,080.31/x
3. Step 3: Cross multiply
   2,379.15x = 3,568.42 × 1,080.31
4. Step 4: Simplify right side
   2,379.15x = 3,854,999.81
5. Step 5: Solve for x
   x = 3,854,999.81/2,379.15
6. Step 6: Final answer
   x = 1,620.33