Finding the Fourth Proportional to 12,863.48, 17,752.55 and 7,198.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,863.48 : 17,752.55 = 7,198.79 : x
2. Step 2: Convert to fraction form
   12,863.48/17,752.55 = 7,198.79/x
3. Step 3: Cross multiply
   12,863.48x = 17,752.55 × 7,198.79
4. Step 4: Simplify right side
   12,863.48x = 127,796,941.79
5. Step 5: Solve for x
   x = 127,796,941.79/12,863.48
6. Step 6: Final answer
   x = 9,934.87