Finding the Fourth Proportional to 12,856.56, 17,742.84 and 7,267.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.56 : 17,742.84 = 7,267.56 : x
2. Step 2: Convert to fraction form
   12,856.56/17,742.84 = 7,267.56/x
3. Step 3: Cross multiply
   12,856.56x = 17,742.84 × 7,267.56
4. Step 4: Simplify right side
   12,856.56x = 128,947,154.27
5. Step 5: Solve for x
   x = 128,947,154.27/12,856.56
6. Step 6: Final answer
   x = 10,029.68