Finding the Fourth Proportional to 9,267.68, 12,790.61 and 5,289.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,267.68 : 12,790.61 = 5,289.57 : x
2. Step 2: Convert to fraction form
   9,267.68/12,790.61 = 5,289.57/x
3. Step 3: Cross multiply
   9,267.68x = 12,790.61 × 5,289.57
4. Step 4: Simplify right side
   9,267.68x = 67,656,820.33
5. Step 5: Solve for x
   x = 67,656,820.33/9,267.68
6. Step 6: Final answer
   x = 7,300.30