Finding the Fourth Proportional to 9,831.89, 13,567.89 and 5,355.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,831.89 : 13,567.89 = 5,355.63 : x
2. Step 2: Convert to fraction form
   9,831.89/13,567.89 = 5,355.63/x
3. Step 3: Cross multiply
   9,831.89x = 13,567.89 × 5,355.63
4. Step 4: Simplify right side
   9,831.89x = 72,664,598.72
5. Step 5: Solve for x
   x = 72,664,598.72/9,831.89
6. Step 6: Final answer
   x = 7,390.71