Finding the Fourth Proportional to 12,578.15, 17,357.69 and 7,272.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,578.15 : 17,357.69 = 7,272.86 : x
2. Step 2: Convert to fraction form
   12,578.15/17,357.69 = 7,272.86/x
3. Step 3: Cross multiply
   12,578.15x = 17,357.69 × 7,272.86
4. Step 4: Simplify right side
   12,578.15x = 126,239,980.69
5. Step 5: Solve for x
   x = 126,239,980.69/12,578.15
6. Step 6: Final answer
   x = 10,036.45