Finding the Fourth Proportional to 12,914.56, 17,790.60 and 8,928.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,914.56 : 17,790.60 = 8,928.82 : x
2. Step 2: Convert to fraction form
   12,914.56/17,790.60 = 8,928.82/x
3. Step 3: Cross multiply
   12,914.56x = 17,790.60 × 8,928.82
4. Step 4: Simplify right side
   12,914.56x = 158,849,065.09
5. Step 5: Solve for x
   x = 158,849,065.09/12,914.56
6. Step 6: Final answer
   x = 12,300.00