Finding the Fourth Proportional to 2,405.55, 3,317.82 and 1,660.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.55 : 3,317.82 = 1,660.76 : x
2. Step 2: Convert to fraction form
   2,405.55/3,317.82 = 1,660.76/x
3. Step 3: Cross multiply
   2,405.55x = 3,317.82 × 1,660.76
4. Step 4: Simplify right side
   2,405.55x = 5,510,102.74
5. Step 5: Solve for x
   x = 5,510,102.74/2,405.55
6. Step 6: Final answer
   x = 2,290.58