Finding the Fourth Proportional to 2,380.13, 3,284.43 and 1,317.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.13 : 3,284.43 = 1,317.86 : x
2. Step 2: Convert to fraction form
   2,380.13/3,284.43 = 1,317.86/x
3. Step 3: Cross multiply
   2,380.13x = 3,284.43 × 1,317.86
4. Step 4: Simplify right side
   2,380.13x = 4,328,402.50
5. Step 5: Solve for x
   x = 4,328,402.50/2,380.13
6. Step 6: Final answer
   x = 1,818.56