Finding the Fourth Proportional to 9,267.69, 12,790.32 and 5,289.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,267.69 : 12,790.32 = 5,289.40 : x
2. Step 2: Convert to fraction form
   9,267.69/12,790.32 = 5,289.40/x
3. Step 3: Cross multiply
   9,267.69x = 12,790.32 × 5,289.40
4. Step 4: Simplify right side
   9,267.69x = 67,653,028.21
5. Step 5: Solve for x
   x = 67,653,028.21/9,267.69
6. Step 6: Final answer
   x = 7,299.88