Finding the Fourth Proportional to 9,268.71, 12,791.72 and 5,290.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,268.71 : 12,791.72 = 5,290.41 : x
2. Step 2: Convert to fraction form
   9,268.71/12,791.72 = 5,290.41/x
3. Step 3: Cross multiply
   9,268.71x = 12,791.72 × 5,290.41
4. Step 4: Simplify right side
   9,268.71x = 67,673,443.41
5. Step 5: Solve for x
   x = 67,673,443.41/9,268.71
6. Step 6: Final answer
   x = 7,301.28