Finding the Fourth Proportional to 3,995.19, 5,505.57 and 2,874.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,995.19 : 5,505.57 = 2,874.15 : x
2. Step 2: Convert to fraction form
   3,995.19/5,505.57 = 2,874.15/x
3. Step 3: Cross multiply
   3,995.19x = 5,505.57 × 2,874.15
4. Step 4: Simplify right side
   3,995.19x = 15,823,834.02
5. Step 5: Solve for x
   x = 15,823,834.02/3,995.19
6. Step 6: Final answer
   x = 3,960.72