Finding the Fourth Proportional to 12,864.42, 17,751.65 and 7,198.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,864.42 : 17,751.65 = 7,198.83 : x
2. Step 2: Convert to fraction form
   12,864.42/17,751.65 = 7,198.83/x
3. Step 3: Cross multiply
   12,864.42x = 17,751.65 × 7,198.83
4. Step 4: Simplify right side
   12,864.42x = 127,791,074.58
5. Step 5: Solve for x
   x = 127,791,074.58/12,864.42
6. Step 6: Final answer
   x = 9,933.68