Finding the Fourth Proportional to 9,831.99, 13,567.90 and 5,355.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,831.99 : 13,567.90 = 5,355.73 : x
2. Step 2: Convert to fraction form
   9,831.99/13,567.90 = 5,355.73/x
3. Step 3: Cross multiply
   9,831.99x = 13,567.90 × 5,355.73
4. Step 4: Simplify right side
   9,831.99x = 72,666,009.07
5. Step 5: Solve for x
   x = 72,666,009.07/9,831.99
6. Step 6: Final answer
   x = 7,390.77