Finding the Fourth Proportional to 5,447.12, 8,171.64 and 2,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,447.12 : 8,171.64 = 2,528.72 : x
2. Step 2: Convert to fraction form
   5,447.12/8,171.64 = 2,528.72/x
3. Step 3: Cross multiply
   5,447.12x = 8,171.64 × 2,528.72
4. Step 4: Simplify right side
   5,447.12x = 20,663,789.50
5. Step 5: Solve for x
   x = 20,663,789.50/5,447.12
6. Step 6: Final answer
   x = 3,793.53