Finding the Fourth Proportional to 9,268.86, 12,790.98 and 5,289.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,268.86 : 12,790.98 = 5,289.72 : x
2. Step 2: Convert to fraction form
   9,268.86/12,790.98 = 5,289.72/x
3. Step 3: Cross multiply
   9,268.86x = 12,790.98 × 5,289.72
4. Step 4: Simplify right side
   9,268.86x = 67,660,702.73
5. Step 5: Solve for x
   x = 67,660,702.73/9,268.86
6. Step 6: Final answer
   x = 7,299.79