Finding the Fourth Proportional to 3,456.09, 5,180.56 and 1,605.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.09 : 5,180.56 = 1,605.69 : x
2. Step 2: Convert to fraction form
   3,456.09/5,180.56 = 1,605.69/x
3. Step 3: Cross multiply
   3,456.09x = 5,180.56 × 1,605.69
4. Step 4: Simplify right side
   3,456.09x = 8,318,373.39
5. Step 5: Solve for x
   x = 8,318,373.39/3,456.09
6. Step 6: Final answer
   x = 2,406.87