Finding the Fourth Proportional to 5,209.37, 7,189.10 and 2,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,209.37 : 7,189.10 = 2,851.50 : x
2. Step 2: Convert to fraction form
   5,209.37/7,189.10 = 2,851.50/x
3. Step 3: Cross multiply
   5,209.37x = 7,189.10 × 2,851.50
4. Step 4: Simplify right side
   5,209.37x = 20,499,704.39
5. Step 5: Solve for x
   x = 20,499,704.39/5,209.37
6. Step 6: Final answer
   x = 3,935.16