Finding the Fourth Proportional to 5,131.73, 7,081.78 and 2,773.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.73 : 7,081.78 = 2,773.87 : x
2. Step 2: Convert to fraction form
   5,131.73/7,081.78 = 2,773.87/x
3. Step 3: Cross multiply
   5,131.73x = 7,081.78 × 2,773.87
4. Step 4: Simplify right side
   5,131.73x = 19,643,937.09
5. Step 5: Solve for x
   x = 19,643,937.09/5,131.73
6. Step 6: Final answer
   x = 3,827.94