Finding the Fourth Proportional to 8,185.26, 12,279.02 and 2,918.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,185.26 : 12,279.02 = 2,918.72 : x
2. Step 2: Convert to fraction form
   8,185.26/12,279.02 = 2,918.72/x
3. Step 3: Cross multiply
   8,185.26x = 12,279.02 × 2,918.72
4. Step 4: Simplify right side
   8,185.26x = 35,839,021.25
5. Step 5: Solve for x
   x = 35,839,021.25/8,185.26
6. Step 6: Final answer
   x = 4,378.48