Finding the Fourth Proportional to 12,896.74, 17,800.67 and 7,863.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,896.74 : 17,800.67 = 7,863.73 : x
2. Step 2: Convert to fraction form
   12,896.74/17,800.67 = 7,863.73/x
3. Step 3: Cross multiply
   12,896.74x = 17,800.67 × 7,863.73
4. Step 4: Simplify right side
   12,896.74x = 139,979,693.75
5. Step 5: Solve for x
   x = 139,979,693.75/12,896.74
6. Step 6: Final answer
   x = 10,853.88