Finding the Fourth Proportional to 9,256.09, 12,773.17 and 5,479.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.09 : 12,773.17 = 5,479.31 : x
2. Step 2: Convert to fraction form
   9,256.09/12,773.17 = 5,479.31/x
3. Step 3: Cross multiply
   9,256.09x = 12,773.17 × 5,479.31
4. Step 4: Simplify right side
   9,256.09x = 69,988,181.48
5. Step 5: Solve for x
   x = 69,988,181.48/9,256.09
6. Step 6: Final answer
   x = 7,561.31