Finding the Fourth Proportional to 9,791.96, 13,512.96 and 5,315.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,791.96 : 13,512.96 = 5,315.72 : x
2. Step 2: Convert to fraction form
   9,791.96/13,512.96 = 5,315.72/x
3. Step 3: Cross multiply
   9,791.96x = 13,512.96 × 5,315.72
4. Step 4: Simplify right side
   9,791.96x = 71,831,111.73
5. Step 5: Solve for x
   x = 71,831,111.73/9,791.96
6. Step 6: Final answer
   x = 7,335.72