Finding the Fourth Proportional to 12,868.80, 19,304.10 and 5,472.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.80 : 19,304.10 = 5,472.42 : x
2. Step 2: Convert to fraction form
   12,868.80/19,304.10 = 5,472.42/x
3. Step 3: Cross multiply
   12,868.80x = 19,304.10 × 5,472.42
4. Step 4: Simplify right side
   12,868.80x = 105,640,142.92
5. Step 5: Solve for x
   x = 105,640,142.92/12,868.80
6. Step 6: Final answer
   x = 8,209.01