Finding the Fourth Proportional to 9,791.88, 13,512.72 and 5,315.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,791.88 : 13,512.72 = 5,315.75 : x
2. Step 2: Convert to fraction form
   9,791.88/13,512.72 = 5,315.75/x
3. Step 3: Cross multiply
   9,791.88x = 13,512.72 × 5,315.75
4. Step 4: Simplify right side
   9,791.88x = 71,830,241.34
5. Step 5: Solve for x
   x = 71,830,241.34/9,791.88
6. Step 6: Final answer
   x = 7,335.69