Finding the Fourth Proportional to 20,479.55, 30,695.23 and 8,630.79

Step by Step Solution

1. Step 1: Write the proportion equation
   20,479.55 : 30,695.23 = 8,630.79 : x
2. Step 2: Convert to fraction form
   20,479.55/30,695.23 = 8,630.79/x
3. Step 3: Cross multiply
   20,479.55x = 30,695.23 × 8,630.79
4. Step 4: Simplify right side
   20,479.55x = 264,924,085.03
5. Step 5: Solve for x
   x = 264,924,085.03/20,479.55
6. Step 6: Final answer
   x = 12,936.03