Finding the Fourth Proportional to 9,256.28, 12,778.43 and 5,480.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.28 : 12,778.43 = 5,480.60 : x
2. Step 2: Convert to fraction form
   9,256.28/12,778.43 = 5,480.60/x
3. Step 3: Cross multiply
   9,256.28x = 12,778.43 × 5,480.60
4. Step 4: Simplify right side
   9,256.28x = 70,033,372.16
5. Step 5: Solve for x
   x = 70,033,372.16/9,256.28
6. Step 6: Final answer
   x = 7,566.04