Finding the Fourth Proportional to 9,259.38, 12,776.94 and 5,280.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,259.38 : 12,776.94 = 5,280.12 : x
2. Step 2: Convert to fraction form
   9,259.38/12,776.94 = 5,280.12/x
3. Step 3: Cross multiply
   9,259.38x = 12,776.94 × 5,280.12
4. Step 4: Simplify right side
   9,259.38x = 67,463,776.43
5. Step 5: Solve for x
   x = 67,463,776.43/9,259.38
6. Step 6: Final answer
   x = 7,285.99