Finding the Fourth Proportional to 5,131.57, 7,081.48 and 2,893.45

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.57 : 7,081.48 = 2,893.45 : x
2. Step 2: Convert to fraction form
   5,131.57/7,081.48 = 2,893.45/x
3. Step 3: Cross multiply
   5,131.57x = 7,081.48 × 2,893.45
4. Step 4: Simplify right side
   5,131.57x = 20,489,908.31
5. Step 5: Solve for x
   x = 20,489,908.31/5,131.57
6. Step 6: Final answer
   x = 3,992.91