Finding the Fourth Proportional to 20,081.82, 30,130.99 and 8,831.37

Step by Step Solution

1. Step 1: Write the proportion equation
   20,081.82 : 30,130.99 = 8,831.37 : x
2. Step 2: Convert to fraction form
   20,081.82/30,130.99 = 8,831.37/x
3. Step 3: Cross multiply
   20,081.82x = 30,130.99 × 8,831.37
4. Step 4: Simplify right side
   20,081.82x = 266,097,877.00
5. Step 5: Solve for x
   x = 266,097,877.00/20,081.82
6. Step 6: Final answer
   x = 13,250.69