Finding the Fourth Proportional to 5,167.71, 7,131.56 and 2,809.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,167.71 : 7,131.56 = 2,809.98 : x
2. Step 2: Convert to fraction form
   5,167.71/7,131.56 = 2,809.98/x
3. Step 3: Cross multiply
   5,167.71x = 7,131.56 × 2,809.98
4. Step 4: Simplify right side
   5,167.71x = 20,039,526.92
5. Step 5: Solve for x
   x = 20,039,526.92/5,167.71
6. Step 6: Final answer
   x = 3,877.84