Finding the Fourth Proportional to 8,759.35, 12,089.46 and 5,222.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.35 : 12,089.46 = 5,222.78 : x
2. Step 2: Convert to fraction form
   8,759.35/12,089.46 = 5,222.78/x
3. Step 3: Cross multiply
   8,759.35x = 12,089.46 × 5,222.78
4. Step 4: Simplify right side
   8,759.35x = 63,140,589.90
5. Step 5: Solve for x
   x = 63,140,589.90/8,759.35
6. Step 6: Final answer
   x = 7,208.36