Finding the Fourth Proportional to 9,831.39, 13,567.30 and 5,355.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,831.39 : 13,567.30 = 5,355.13 : x
2. Step 2: Convert to fraction form
   9,831.39/13,567.30 = 5,355.13/x
3. Step 3: Cross multiply
   9,831.39x = 13,567.30 × 5,355.13
4. Step 4: Simplify right side
   9,831.39x = 72,654,628.47
5. Step 5: Solve for x
   x = 72,654,628.47/9,831.39
6. Step 6: Final answer
   x = 7,390.07