Finding the Fourth Proportional to 2,379.95, 3,284.30 and 1,317.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.95 : 3,284.30 = 1,317.78 : x
2. Step 2: Convert to fraction form
   2,379.95/3,284.30 = 1,317.78/x
3. Step 3: Cross multiply
   2,379.95x = 3,284.30 × 1,317.78
4. Step 4: Simplify right side
   2,379.95x = 4,327,978.27
5. Step 5: Solve for x
   x = 4,327,978.27/2,379.95
6. Step 6: Final answer
   x = 1,818.52