Finding the Fourth Proportional to 8,287.69, 12,429.73 and 2,739.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,287.69 : 12,429.73 = 2,739.72 : x
2. Step 2: Convert to fraction form
   8,287.69/12,429.73 = 2,739.72/x
3. Step 3: Cross multiply
   8,287.69x = 12,429.73 × 2,739.72
4. Step 4: Simplify right side
   8,287.69x = 34,053,979.88
5. Step 5: Solve for x
   x = 34,053,979.88/8,287.69
6. Step 6: Final answer
   x = 4,108.98