Finding the Fourth Proportional to 9,250.57, 12,760.59 and 5,711.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,250.57 : 12,760.59 = 5,711.26 : x
2. Step 2: Convert to fraction form
   9,250.57/12,760.59 = 5,711.26/x
3. Step 3: Cross multiply
   9,250.57x = 12,760.59 × 5,711.26
4. Step 4: Simplify right side
   9,250.57x = 72,879,047.24
5. Step 5: Solve for x
   x = 72,879,047.24/9,250.57
6. Step 6: Final answer
   x = 7,878.33