Finding the Fourth Proportional to 3,665.98, 5,497.86 and 1,325.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.98 : 5,497.86 = 1,325.71 : x
2. Step 2: Convert to fraction form
   3,665.98/5,497.86 = 1,325.71/x
3. Step 3: Cross multiply
   3,665.98x = 5,497.86 × 1,325.71
4. Step 4: Simplify right side
   3,665.98x = 7,288,567.98
5. Step 5: Solve for x
   x = 7,288,567.98/3,665.98
6. Step 6: Final answer
   x = 1,988.16