Finding the Fourth Proportional to 5,131.92, 7,081.92 and 2,893.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.92 : 7,081.92 = 2,893.76 : x
2. Step 2: Convert to fraction form
   5,131.92/7,081.92 = 2,893.76/x
3. Step 3: Cross multiply
   5,131.92x = 7,081.92 × 2,893.76
4. Step 4: Simplify right side
   5,131.92x = 20,493,376.82
5. Step 5: Solve for x
   x = 20,493,376.82/5,131.92
6. Step 6: Final answer
   x = 3,993.32