Finding the Fourth Proportional to 2,380.67, 3,285.25 and 1,318.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.67 : 3,285.25 = 1,318.38 : x
2. Step 2: Convert to fraction form
   2,380.67/3,285.25 = 1,318.38/x
3. Step 3: Cross multiply
   2,380.67x = 3,285.25 × 1,318.38
4. Step 4: Simplify right side
   2,380.67x = 4,331,188.98
5. Step 5: Solve for x
   x = 4,331,188.98/2,380.67
6. Step 6: Final answer
   x = 1,819.31