Finding the Fourth Proportional to 3,664.40, 5,488.61 and 1,904.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.40 : 5,488.61 = 1,904.09 : x
2. Step 2: Convert to fraction form
   3,664.40/5,488.61 = 1,904.09/x
3. Step 3: Cross multiply
   3,664.40x = 5,488.61 × 1,904.09
4. Step 4: Simplify right side
   3,664.40x = 10,450,807.41
5. Step 5: Solve for x
   x = 10,450,807.41/3,664.40
6. Step 6: Final answer
   x = 2,851.98