Finding the Fourth Proportional to 9,477.39, 13,078.86 and 5,228.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,477.39 : 13,078.86 = 5,228.61 : x
2. Step 2: Convert to fraction form
   9,477.39/13,078.86 = 5,228.61/x
3. Step 3: Cross multiply
   9,477.39x = 13,078.86 × 5,228.61
4. Step 4: Simplify right side
   9,477.39x = 68,384,258.18
5. Step 5: Solve for x
   x = 68,384,258.18/9,477.39
6. Step 6: Final answer
   x = 7,215.52