Finding the Fourth Proportional to 9,991.82, 14,979.09 and 3,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.82 : 14,979.09 = 3,831.50 : x
2. Step 2: Convert to fraction form
   9,991.82/14,979.09 = 3,831.50/x
3. Step 3: Cross multiply
   9,991.82x = 14,979.09 × 3,831.50
4. Step 4: Simplify right side
   9,991.82x = 57,392,383.34
5. Step 5: Solve for x
   x = 57,392,383.34/9,991.82
6. Step 6: Final answer
   x = 5,743.94