Finding the Fourth Proportional to 3,897.38, 5,379.37 and 2,406.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,897.38 : 5,379.37 = 2,406.53 : x
2. Step 2: Convert to fraction form
   3,897.38/5,379.37 = 2,406.53/x
3. Step 3: Cross multiply
   3,897.38x = 5,379.37 × 2,406.53
4. Step 4: Simplify right side
   3,897.38x = 12,945,622.72
5. Step 5: Solve for x
   x = 12,945,622.72/3,897.38
6. Step 6: Final answer
   x = 3,321.62