Finding the Fourth Proportional to 9,276.95, 12,791.89 and 7,147.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,276.95 : 12,791.89 = 7,147.73 : x
2. Step 2: Convert to fraction form
   9,276.95/12,791.89 = 7,147.73/x
3. Step 3: Cross multiply
   9,276.95x = 12,791.89 × 7,147.73
4. Step 4: Simplify right side
   9,276.95x = 91,433,011.53
5. Step 5: Solve for x
   x = 91,433,011.53/9,276.95
6. Step 6: Final answer
   x = 9,855.93