Finding the Fourth Proportional to 8,958.89, 13,370.58 and 8,725.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,958.89 : 13,370.58 = 8,725.61 : x
2. Step 2: Convert to fraction form
   8,958.89/13,370.58 = 8,725.61/x
3. Step 3: Cross multiply
   8,958.89x = 13,370.58 × 8,725.61
4. Step 4: Simplify right side
   8,958.89x = 116,666,399.70
5. Step 5: Solve for x
   x = 116,666,399.70/8,958.89
6. Step 6: Final answer
   x = 13,022.42