Finding the Fourth Proportional to 2,318.72, 3,198.71 and 1,521.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,318.72 : 3,198.71 = 1,521.72 : x
2. Step 2: Convert to fraction form
   2,318.72/3,198.71 = 1,521.72/x
3. Step 3: Cross multiply
   2,318.72x = 3,198.71 × 1,521.72
4. Step 4: Simplify right side
   2,318.72x = 4,867,544.79
5. Step 5: Solve for x
   x = 4,867,544.79/2,318.72
6. Step 6: Final answer
   x = 2,099.24