Finding the Fourth Proportional to 20,196.82, 30,294.79 and 5,405.74

Step by Step Solution

1. Step 1: Write the proportion equation
   20,196.82 : 30,294.79 = 5,405.74 : x
2. Step 2: Convert to fraction form
   20,196.82/30,294.79 = 5,405.74/x
3. Step 3: Cross multiply
   20,196.82x = 30,294.79 × 5,405.74
4. Step 4: Simplify right side
   20,196.82x = 163,765,668.84
5. Step 5: Solve for x
   x = 163,765,668.84/20,196.82
6. Step 6: Final answer
   x = 8,108.49