Finding the Fourth Proportional to 5,131.28, 7,081.16 and 2,773.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.28 : 7,081.16 = 2,773.42 : x
2. Step 2: Convert to fraction form
   5,131.28/7,081.16 = 2,773.42/x
3. Step 3: Cross multiply
   5,131.28x = 7,081.16 × 2,773.42
4. Step 4: Simplify right side
   5,131.28x = 19,639,037.70
5. Step 5: Solve for x
   x = 19,639,037.70/5,131.28
6. Step 6: Final answer
   x = 3,827.32