Finding the Fourth Proportional to 7,217.82, 10,815.55 and 4,868.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,217.82 : 10,815.55 = 4,868.61 : x
2. Step 2: Convert to fraction form
   7,217.82/10,815.55 = 4,868.61/x
3. Step 3: Cross multiply
   7,217.82x = 10,815.55 × 4,868.61
4. Step 4: Simplify right side
   7,217.82x = 52,656,694.89
5. Step 5: Solve for x
   x = 52,656,694.89/7,217.82
6. Step 6: Final answer
   x = 7,295.37