Finding the Fourth Proportional to 9,259.89, 12,778.32 and 5,282.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,259.89 : 12,778.32 = 5,282.28 : x
2. Step 2: Convert to fraction form
   9,259.89/12,778.32 = 5,282.28/x
3. Step 3: Cross multiply
   9,259.89x = 12,778.32 × 5,282.28
4. Step 4: Simplify right side
   9,259.89x = 67,498,664.17
5. Step 5: Solve for x
   x = 67,498,664.17/9,259.89
6. Step 6: Final answer
   x = 7,289.36