Finding the Fourth Proportional to 5,131.80, 7,081.89 and 2,773.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.80 : 7,081.89 = 2,773.94 : x
2. Step 2: Convert to fraction form
   5,131.80/7,081.89 = 2,773.94/x
3. Step 3: Cross multiply
   5,131.80x = 7,081.89 × 2,773.94
4. Step 4: Simplify right side
   5,131.80x = 19,644,718.69
5. Step 5: Solve for x
   x = 19,644,718.69/5,131.80
6. Step 6: Final answer
   x = 3,828.04