Finding the Fourth Proportional to 9,054.79, 12,497.16 and 5,280.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.79 : 12,497.16 = 5,280.16 : x
2. Step 2: Convert to fraction form
   9,054.79/12,497.16 = 5,280.16/x
3. Step 3: Cross multiply
   9,054.79x = 12,497.16 × 5,280.16
4. Step 4: Simplify right side
   9,054.79x = 65,987,004.35
5. Step 5: Solve for x
   x = 65,987,004.35/9,054.79
6. Step 6: Final answer
   x = 7,287.52