Finding the Fourth Proportional to 9,256.74, 12,773.31 and 5,480.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.74 : 12,773.31 = 5,480.07 : x
2. Step 2: Convert to fraction form
   9,256.74/12,773.31 = 5,480.07/x
3. Step 3: Cross multiply
   9,256.74x = 12,773.31 × 5,480.07
4. Step 4: Simplify right side
   9,256.74x = 69,998,564.48
5. Step 5: Solve for x
   x = 69,998,564.48/9,256.74
6. Step 6: Final answer
   x = 7,561.91