Finding the Fourth Proportional to 9,054.89, 12,495.83 and 5,280.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.89 : 12,495.83 = 5,280.29 : x
2. Step 2: Convert to fraction form
   9,054.89/12,495.83 = 5,280.29/x
3. Step 3: Cross multiply
   9,054.89x = 12,495.83 × 5,280.29
4. Step 4: Simplify right side
   9,054.89x = 65,981,517.31
5. Step 5: Solve for x
   x = 65,981,517.31/9,054.89
6. Step 6: Final answer
   x = 7,286.84