Finding the Fourth Proportional to 20,571.30, 30,836.17 and 8,100.08

Step by Step Solution

1. Step 1: Write the proportion equation
   20,571.30 : 30,836.17 = 8,100.08 : x
2. Step 2: Convert to fraction form
   20,571.30/30,836.17 = 8,100.08/x
3. Step 3: Cross multiply
   20,571.30x = 30,836.17 × 8,100.08
4. Step 4: Simplify right side
   20,571.30x = 249,775,443.89
5. Step 5: Solve for x
   x = 249,775,443.89/20,571.30
6. Step 6: Final answer
   x = 12,141.94