Finding the Fourth Proportional to 5,167.79, 7,131.56 and 2,809.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,167.79 : 7,131.56 = 2,809.93 : x
2. Step 2: Convert to fraction form
   5,167.79/7,131.56 = 2,809.93/x
3. Step 3: Cross multiply
   5,167.79x = 7,131.56 × 2,809.93
4. Step 4: Simplify right side
   5,167.79x = 20,039,184.39
5. Step 5: Solve for x
   x = 20,039,184.39/5,167.79
6. Step 6: Final answer
   x = 3,877.71