Finding the Fourth Proportional to 5,167.89, 7,131.75 and 2,809.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,167.89 : 7,131.75 = 2,809.98 : x
2. Step 2: Convert to fraction form
   5,167.89/7,131.75 = 2,809.98/x
3. Step 3: Cross multiply
   5,167.89x = 7,131.75 × 2,809.98
4. Step 4: Simplify right side
   5,167.89x = 20,040,074.87
5. Step 5: Solve for x
   x = 20,040,074.87/5,167.89
6. Step 6: Final answer
   x = 3,877.81