Finding the Fourth Proportional to 20,665.32, 30,980.46 and 8,194.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,665.32 : 30,980.46 = 8,194.15 : x
2. Step 2: Convert to fraction form
   20,665.32/30,980.46 = 8,194.15/x
3. Step 3: Cross multiply
   20,665.32x = 30,980.46 × 8,194.15
4. Step 4: Simplify right side
   20,665.32x = 253,858,536.31
5. Step 5: Solve for x
   x = 253,858,536.31/20,665.32
6. Step 6: Final answer
   x = 12,284.28