Finding the Fourth Proportional to 9,256.41, 12,773.52 and 5,278.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.41 : 12,773.52 = 5,278.79 : x
2. Step 2: Convert to fraction form
   9,256.41/12,773.52 = 5,278.79/x
3. Step 3: Cross multiply
   9,256.41x = 12,773.52 × 5,278.79
4. Step 4: Simplify right side
   9,256.41x = 67,428,761.57
5. Step 5: Solve for x
   x = 67,428,761.57/9,256.41
6. Step 6: Final answer
   x = 7,284.55