Finding the Fourth Proportional to 5,208.89, 7,188.27 and 2,851.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,208.89 : 7,188.27 = 2,851.18 : x
2. Step 2: Convert to fraction form
   5,208.89/7,188.27 = 2,851.18/x
3. Step 3: Cross multiply
   5,208.89x = 7,188.27 × 2,851.18
4. Step 4: Simplify right side
   5,208.89x = 20,495,015.72
5. Step 5: Solve for x
   x = 20,495,015.72/5,208.89
6. Step 6: Final answer
   x = 3,934.63