Finding the Fourth Proportional to 9,391.14, 12,957.72 and 5,613.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.14 : 12,957.72 = 5,613.74 : x
2. Step 2: Convert to fraction form
   9,391.14/12,957.72 = 5,613.74/x
3. Step 3: Cross multiply
   9,391.14x = 12,957.72 × 5,613.74
4. Step 4: Simplify right side
   9,391.14x = 72,741,271.07
5. Step 5: Solve for x
   x = 72,741,271.07/9,391.14
6. Step 6: Final answer
   x = 7,745.73