Finding the Fourth Proportional to 2,489.78, 3,732.62 and 1,379.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,489.78 : 3,732.62 = 1,379.15 : x
2. Step 2: Convert to fraction form
   2,489.78/3,732.62 = 1,379.15/x
3. Step 3: Cross multiply
   2,489.78x = 3,732.62 × 1,379.15
4. Step 4: Simplify right side
   2,489.78x = 5,147,842.87
5. Step 5: Solve for x
   x = 5,147,842.87/2,489.78
6. Step 6: Final answer
   x = 2,067.59