Finding the Fourth Proportional to 2,510.80, 3,763.15 and 2,215.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.80 : 3,763.15 = 2,215.55 : x
2. Step 2: Convert to fraction form
   2,510.80/3,763.15 = 2,215.55/x
3. Step 3: Cross multiply
   2,510.80x = 3,763.15 × 2,215.55
4. Step 4: Simplify right side
   2,510.80x = 8,337,446.98
5. Step 5: Solve for x
   x = 8,337,446.98/2,510.80
6. Step 6: Final answer
   x = 3,320.63