Finding the Fourth Proportional to 5,486.56, 7,571.50 and 3,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,486.56 : 7,571.50 = 3,128.82 : x
2. Step 2: Convert to fraction form
   5,486.56/7,571.50 = 3,128.82/x
3. Step 3: Cross multiply
   5,486.56x = 7,571.50 × 3,128.82
4. Step 4: Simplify right side
   5,486.56x = 23,689,860.63
5. Step 5: Solve for x
   x = 23,689,860.63/5,486.56
6. Step 6: Final answer
   x = 4,317.80