Finding the Fourth Proportional to 20,304.94, 30,466.50 and 12,907.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,304.94 : 30,466.50 = 12,907.48 : x
2. Step 2: Convert to fraction form
   20,304.94/30,466.50 = 12,907.48/x
3. Step 3: Cross multiply
   20,304.94x = 30,466.50 × 12,907.48
4. Step 4: Simplify right side
   20,304.94x = 393,245,522.55
5. Step 5: Solve for x
   x = 393,245,522.55/20,304.94
6. Step 6: Final answer
   x = 19,366.99