Finding the Fourth Proportional to 5,208.96, 7,188.24 and 2,851.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,208.96 : 7,188.24 = 2,851.20 : x
2. Step 2: Convert to fraction form
   5,208.96/7,188.24 = 2,851.20/x
3. Step 3: Cross multiply
   5,208.96x = 7,188.24 × 2,851.20
4. Step 4: Simplify right side
   5,208.96x = 20,495,109.89
5. Step 5: Solve for x
   x = 20,495,109.89/5,208.96
6. Step 6: Final answer
   x = 3,934.59