Finding the Fourth Proportional to 9,256.67, 12,774.28 and 5,480.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.67 : 12,774.28 = 5,480.05 : x
2. Step 2: Convert to fraction form
   9,256.67/12,774.28 = 5,480.05/x
3. Step 3: Cross multiply
   9,256.67x = 12,774.28 × 5,480.05
4. Step 4: Simplify right side
   9,256.67x = 70,003,629.24
5. Step 5: Solve for x
   x = 70,003,629.24/9,256.67
6. Step 6: Final answer
   x = 7,562.51