Finding the Fourth Proportional to 5,131.67, 7,081.60 and 2,893.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.67 : 7,081.60 = 2,893.78 : x
2. Step 2: Convert to fraction form
   5,131.67/7,081.60 = 2,893.78/x
3. Step 3: Cross multiply
   5,131.67x = 7,081.60 × 2,893.78
4. Step 4: Simplify right side
   5,131.67x = 20,492,542.57
5. Step 5: Solve for x
   x = 20,492,542.57/5,131.67
6. Step 6: Final answer
   x = 3,993.35