Finding the Fourth Proportional to 9,267.31, 12,791.28 and 5,728.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,267.31 : 12,791.28 = 5,728.46 : x
2. Step 2: Convert to fraction form
   9,267.31/12,791.28 = 5,728.46/x
3. Step 3: Cross multiply
   9,267.31x = 12,791.28 × 5,728.46
4. Step 4: Simplify right side
   9,267.31x = 73,274,293.35
5. Step 5: Solve for x
   x = 73,274,293.35/9,267.31
6. Step 6: Final answer
   x = 7,906.75