Finding the Fourth Proportional to 5,682.78, 8,510.94 and 5,485.73

Step by Step Solution

1. Step 1: Write the proportion equation
   5,682.78 : 8,510.94 = 5,485.73 : x
2. Step 2: Convert to fraction form
   5,682.78/8,510.94 = 5,485.73/x
3. Step 3: Cross multiply
   5,682.78x = 8,510.94 × 5,485.73
4. Step 4: Simplify right side
   5,682.78x = 46,688,676.33
5. Step 5: Solve for x
   x = 46,688,676.33/5,682.78
6. Step 6: Final answer
   x = 8,215.82