Finding the Fourth Proportional to 2,874.38, 4,305.49 and 1,315.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,874.38 : 4,305.49 = 1,315.69 : x
2. Step 2: Convert to fraction form
   2,874.38/4,305.49 = 1,315.69/x
3. Step 3: Cross multiply
   2,874.38x = 4,305.49 × 1,315.69
4. Step 4: Simplify right side
   2,874.38x = 5,664,676.09
5. Step 5: Solve for x
   x = 5,664,676.09/2,874.38
6. Step 6: Final answer
   x = 1,970.75