Finding the Fourth Proportional to 9,057.88, 12,496.93 and 5,280.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.88 : 12,496.93 = 5,280.19 : x
2. Step 2: Convert to fraction form
   9,057.88/12,496.93 = 5,280.19/x
3. Step 3: Cross multiply
   9,057.88x = 12,496.93 × 5,280.19
4. Step 4: Simplify right side
   9,057.88x = 65,986,164.82
5. Step 5: Solve for x
   x = 65,986,164.82/9,057.88
6. Step 6: Final answer
   x = 7,284.95