Finding the Fourth Proportional to 9,811.49, 13,537.81 and 5,831.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,811.49 : 13,537.81 = 5,831.15 : x
2. Step 2: Convert to fraction form
   9,811.49/13,537.81 = 5,831.15/x
3. Step 3: Cross multiply
   9,811.49x = 13,537.81 × 5,831.15
4. Step 4: Simplify right side
   9,811.49x = 78,941,000.78
5. Step 5: Solve for x
   x = 78,941,000.78/9,811.49
6. Step 6: Final answer
   x = 8,045.77