Finding the Fourth Proportional to 2,613.57, 3,608.13 and 2,019.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.57 : 3,608.13 = 2,019.15 : x
2. Step 2: Convert to fraction form
   2,613.57/3,608.13 = 2,019.15/x
3. Step 3: Cross multiply
   2,613.57x = 3,608.13 × 2,019.15
4. Step 4: Simplify right side
   2,613.57x = 7,285,355.69
5. Step 5: Solve for x
   x = 7,285,355.69/2,613.57
6. Step 6: Final answer
   x = 2,787.51