Finding the Fourth Proportional to 12,863.72, 17,750.88 and 7,198.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,863.72 : 17,750.88 = 7,198.18 : x
2. Step 2: Convert to fraction form
   12,863.72/17,750.88 = 7,198.18/x
3. Step 3: Cross multiply
   12,863.72x = 17,750.88 × 7,198.18
4. Step 4: Simplify right side
   12,863.72x = 127,773,985.02
5. Step 5: Solve for x
   x = 127,773,985.02/12,863.72
6. Step 6: Final answer
   x = 9,932.89