Finding the Fourth Proportional to 9,831.86, 13,567.83 and 5,355.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,831.86 : 13,567.83 = 5,355.51 : x
2. Step 2: Convert to fraction form
   9,831.86/13,567.83 = 5,355.51/x
3. Step 3: Cross multiply
   9,831.86x = 13,567.83 × 5,355.51
4. Step 4: Simplify right side
   9,831.86x = 72,662,649.24
5. Step 5: Solve for x
   x = 72,662,649.24/9,831.86
6. Step 6: Final answer
   x = 7,390.53