Finding the Fourth Proportional to 9,256.92, 12,774.22 and 5,279.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.92 : 12,774.22 = 5,279.31 : x
2. Step 2: Convert to fraction form
   9,256.92/12,774.22 = 5,279.31/x
3. Step 3: Cross multiply
   9,256.92x = 12,774.22 × 5,279.31
4. Step 4: Simplify right side
   9,256.92x = 67,439,067.39
5. Step 5: Solve for x
   x = 67,439,067.39/9,256.92
6. Step 6: Final answer
   x = 7,285.26