Finding the Fourth Proportional to 2,772.80, 3,826.42 and 1,513.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.80 : 3,826.42 = 1,513.87 : x
2. Step 2: Convert to fraction form
   2,772.80/3,826.42 = 1,513.87/x
3. Step 3: Cross multiply
   2,772.80x = 3,826.42 × 1,513.87
4. Step 4: Simplify right side
   2,772.80x = 5,792,702.45
5. Step 5: Solve for x
   x = 5,792,702.45/2,772.80
6. Step 6: Final answer
   x = 2,089.12