Finding the Fourth Proportional to 10,872.76, 16,309.29 and 3,081.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,872.76 : 16,309.29 = 3,081.57 : x
2. Step 2: Convert to fraction form
   10,872.76/16,309.29 = 3,081.57/x
3. Step 3: Cross multiply
   10,872.76x = 16,309.29 × 3,081.57
4. Step 4: Simplify right side
   10,872.76x = 50,258,170.31
5. Step 5: Solve for x
   x = 50,258,170.31/10,872.76
6. Step 6: Final answer
   x = 4,622.40