Finding the Fourth Proportional to 8,186.25, 12,280.52 and 2,919.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,186.25 : 12,280.52 = 2,919.72 : x
2. Step 2: Convert to fraction form
   8,186.25/12,280.52 = 2,919.72/x
3. Step 3: Cross multiply
   8,186.25x = 12,280.52 × 2,919.72
4. Step 4: Simplify right side
   8,186.25x = 35,855,665.26
5. Step 5: Solve for x
   x = 35,855,665.26/8,186.25
6. Step 6: Final answer
   x = 4,379.99