Finding the Fourth Proportional to 20,549.38, 30,841.54 and 8,078.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,549.38 : 30,841.54 = 8,078.12 : x
2. Step 2: Convert to fraction form
   20,549.38/30,841.54 = 8,078.12/x
3. Step 3: Cross multiply
   20,549.38x = 30,841.54 × 8,078.12
4. Step 4: Simplify right side
   20,549.38x = 249,141,661.10
5. Step 5: Solve for x
   x = 249,141,661.10/20,549.38
6. Step 6: Final answer
   x = 12,124.05