Finding the Fourth Proportional to 2,381.16, 3,285.94 and 1,318.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.16 : 3,285.94 = 1,318.86 : x
2. Step 2: Convert to fraction form
   2,381.16/3,285.94 = 1,318.86/x
3. Step 3: Cross multiply
   2,381.16x = 3,285.94 × 1,318.86
4. Step 4: Simplify right side
   2,381.16x = 4,333,688.47
5. Step 5: Solve for x
   x = 4,333,688.47/2,381.16
6. Step 6: Final answer
   x = 1,819.99