Finding the Fourth Proportional to 9,259.23, 12,778.79 and 5,280.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,259.23 : 12,778.79 = 5,280.92 : x
2. Step 2: Convert to fraction form
   9,259.23/12,778.79 = 5,280.92/x
3. Step 3: Cross multiply
   9,259.23x = 12,778.79 × 5,280.92
4. Step 4: Simplify right side
   9,259.23x = 67,483,767.69
5. Step 5: Solve for x
   x = 67,483,767.69/9,259.23
6. Step 6: Final answer
   x = 7,288.27