Finding the Fourth Proportional to 8,127.50, 12,191.69 and 2,581.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,127.50 : 12,191.69 = 2,581.28 : x
2. Step 2: Convert to fraction form
   8,127.50/12,191.69 = 2,581.28/x
3. Step 3: Cross multiply
   8,127.50x = 12,191.69 × 2,581.28
4. Step 4: Simplify right side
   8,127.50x = 31,470,165.56
5. Step 5: Solve for x
   x = 31,470,165.56/8,127.50
6. Step 6: Final answer
   x = 3,872.06