Finding the Fourth Proportional to 2,455.09, 3,387.72 and 1,660.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,455.09 : 3,387.72 = 1,660.15 : x
2. Step 2: Convert to fraction form
   2,455.09/3,387.72 = 1,660.15/x
3. Step 3: Cross multiply
   2,455.09x = 3,387.72 × 1,660.15
4. Step 4: Simplify right side
   2,455.09x = 5,624,123.36
5. Step 5: Solve for x
   x = 5,624,123.36/2,455.09
6. Step 6: Final answer
   x = 2,290.80