Finding the Fourth Proportional to 12,787.97, 17,647.45 and 7,481.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,787.97 : 17,647.45 = 7,481.76 : x
2. Step 2: Convert to fraction form
   12,787.97/17,647.45 = 7,481.76/x
3. Step 3: Cross multiply
   12,787.97x = 17,647.45 × 7,481.76
4. Step 4: Simplify right side
   12,787.97x = 132,034,016.92
5. Step 5: Solve for x
   x = 132,034,016.92/12,787.97
6. Step 6: Final answer
   x = 10,324.86