Finding the Fourth Proportional to 5,131.72, 7,081.75 and 2,773.85

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.72 : 7,081.75 = 2,773.85 : x
2. Step 2: Convert to fraction form
   5,131.72/7,081.75 = 2,773.85/x
3. Step 3: Cross multiply
   5,131.72x = 7,081.75 × 2,773.85
4. Step 4: Simplify right side
   5,131.72x = 19,643,698.37
5. Step 5: Solve for x
   x = 19,643,698.37/5,131.72
6. Step 6: Final answer
   x = 3,827.90