Finding the Fourth Proportional to 12,558.53, 17,287.27 and 10,856.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,558.53 : 17,287.27 = 10,856.25 : x
2. Step 2: Convert to fraction form
   12,558.53/17,287.27 = 10,856.25/x
3. Step 3: Cross multiply
   12,558.53x = 17,287.27 × 10,856.25
4. Step 4: Simplify right side
   12,558.53x = 187,674,924.94
5. Step 5: Solve for x
   x = 187,674,924.94/12,558.53
6. Step 6: Final answer
   x = 14,944.02