Finding the Fourth Proportional to 5,131.75, 7,081.81 and 2,773.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.75 : 7,081.81 = 2,773.89 : x
2. Step 2: Convert to fraction form
   5,131.75/7,081.81 = 2,773.89/x
3. Step 3: Cross multiply
   5,131.75x = 7,081.81 × 2,773.89
4. Step 4: Simplify right side
   5,131.75x = 19,644,190.53
5. Step 5: Solve for x
   x = 19,644,190.53/5,131.75
6. Step 6: Final answer
   x = 3,827.97