Finding the Fourth Proportional to 2,379.89, 3,284.40 and 1,317.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.89 : 3,284.40 = 1,317.69 : x
2. Step 2: Convert to fraction form
   2,379.89/3,284.40 = 1,317.69/x
3. Step 3: Cross multiply
   2,379.89x = 3,284.40 × 1,317.69
4. Step 4: Simplify right side
   2,379.89x = 4,327,821.04
5. Step 5: Solve for x
   x = 4,327,821.04/2,379.89
6. Step 6: Final answer
   x = 1,818.50