Finding the Fourth Proportional to 5,322.56, 7,982.82 and 3,128.73

Step by Step Solution

1. Step 1: Write the proportion equation
   5,322.56 : 7,982.82 = 3,128.73 : x
2. Step 2: Convert to fraction form
   5,322.56/7,982.82 = 3,128.73/x
3. Step 3: Cross multiply
   5,322.56x = 7,982.82 × 3,128.73
4. Step 4: Simplify right side
   5,322.56x = 24,976,088.42
5. Step 5: Solve for x
   x = 24,976,088.42/5,322.56
6. Step 6: Final answer
   x = 4,692.50