Finding the Fourth Proportional to 12,982.20, 19,472.88 and 4,662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,982.20 : 19,472.88 = 4,662.72 : x
2. Step 2: Convert to fraction form
   12,982.20/19,472.88 = 4,662.72/x
3. Step 3: Cross multiply
   12,982.20x = 19,472.88 × 4,662.72
4. Step 4: Simplify right side
   12,982.20x = 90,796,587.03
5. Step 5: Solve for x
   x = 90,796,587.03/12,982.20
6. Step 6: Final answer
   x = 6,993.93