Finding the Fourth Proportional to 9,256.42, 12,773.54 and 5,278.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.42 : 12,773.54 = 5,278.81 : x
2. Step 2: Convert to fraction form
   9,256.42/12,773.54 = 5,278.81/x
3. Step 3: Cross multiply
   9,256.42x = 12,773.54 × 5,278.81
4. Step 4: Simplify right side
   9,256.42x = 67,429,064.29
5. Step 5: Solve for x
   x = 67,429,064.29/9,256.42
6. Step 6: Final answer
   x = 7,284.58