Finding the Fourth Proportional to 8,238.89, 12,355.94 and 4,728.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,238.89 : 12,355.94 = 4,728.30 : x
2. Step 2: Convert to fraction form
   8,238.89/12,355.94 = 4,728.30/x
3. Step 3: Cross multiply
   8,238.89x = 12,355.94 × 4,728.30
4. Step 4: Simplify right side
   8,238.89x = 58,422,567.46
5. Step 5: Solve for x
   x = 58,422,567.46/8,238.89
6. Step 6: Final answer
   x = 7,091.08