Finding the Fourth Proportional to 8,906.14, 12,290.59 and 5,550.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,906.14 : 12,290.59 = 5,550.31 : x
2. Step 2: Convert to fraction form
   8,906.14/12,290.59 = 5,550.31/x
3. Step 3: Cross multiply
   8,906.14x = 12,290.59 × 5,550.31
4. Step 4: Simplify right side
   8,906.14x = 68,216,560.79
5. Step 5: Solve for x
   x = 68,216,560.79/8,906.14
6. Step 6: Final answer
   x = 7,659.50