Finding the Fourth Proportional to 12,856.96, 17,742.12 and 7,268.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.96 : 17,742.12 = 7,268.08 : x
2. Step 2: Convert to fraction form
   12,856.96/17,742.12 = 7,268.08/x
3. Step 3: Cross multiply
   12,856.96x = 17,742.12 × 7,268.08
4. Step 4: Simplify right side
   12,856.96x = 128,951,147.53
5. Step 5: Solve for x
   x = 128,951,147.53/12,856.96
6. Step 6: Final answer
   x = 10,029.68