Finding the Fourth Proportional to 2,549.61, 3,819.69 and 1,315.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,549.61 : 3,819.69 = 1,315.71 : x
2. Step 2: Convert to fraction form
   2,549.61/3,819.69 = 1,315.71/x
3. Step 3: Cross multiply
   2,549.61x = 3,819.69 × 1,315.71
4. Step 4: Simplify right side
   2,549.61x = 5,025,604.33
5. Step 5: Solve for x
   x = 5,025,604.33/2,549.61
6. Step 6: Final answer
   x = 1,971.13