Finding the Fourth Proportional to 5,169.69, 7,134.28 and 2,811.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,169.69 : 7,134.28 = 2,811.98 : x
2. Step 2: Convert to fraction form
   5,169.69/7,134.28 = 2,811.98/x
3. Step 3: Cross multiply
   5,169.69x = 7,134.28 × 2,811.98
4. Step 4: Simplify right side
   5,169.69x = 20,061,463.48
5. Step 5: Solve for x
   x = 20,061,463.48/5,169.69
6. Step 6: Final answer
   x = 3,880.59