Finding the Fourth Proportional to 3,663.91, 5,496.18 and 1,198.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.91 : 5,496.18 = 1,198.72 : x
2. Step 2: Convert to fraction form
   3,663.91/5,496.18 = 1,198.72/x
3. Step 3: Cross multiply
   3,663.91x = 5,496.18 × 1,198.72
4. Step 4: Simplify right side
   3,663.91x = 6,588,380.89
5. Step 5: Solve for x
   x = 6,588,380.89/3,663.91
6. Step 6: Final answer
   x = 1,798.18