Finding the Fourth Proportional to 5,209.16, 7,188.72 and 2,851.52

Step by Step Solution

1. Step 1: Write the proportion equation
   5,209.16 : 7,188.72 = 2,851.52 : x
2. Step 2: Convert to fraction form
   5,209.16/7,188.72 = 2,851.52/x
3. Step 3: Cross multiply
   5,209.16x = 7,188.72 × 2,851.52
4. Step 4: Simplify right side
   5,209.16x = 20,498,778.85
5. Step 5: Solve for x
   x = 20,498,778.85/5,209.16
6. Step 6: Final answer
   x = 3,935.14