Finding the Fourth Proportional to 5,728.72, 8,575.78 and 5,181.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,728.72 : 8,575.78 = 5,181.16 : x
2. Step 2: Convert to fraction form
   5,728.72/8,575.78 = 5,181.16/x
3. Step 3: Cross multiply
   5,728.72x = 8,575.78 × 5,181.16
4. Step 4: Simplify right side
   5,728.72x = 44,432,488.30
5. Step 5: Solve for x
   x = 44,432,488.30/5,728.72
6. Step 6: Final answer
   x = 7,756.09