Finding the Fourth Proportional to 1,604.04, 2,213.58 and 905.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.04 : 2,213.58 = 905.46 : x
2. Step 2: Convert to fraction form
   1,604.04/2,213.58 = 905.46/x
3. Step 3: Cross multiply
   1,604.04x = 2,213.58 × 905.46
4. Step 4: Simplify right side
   1,604.04x = 2,004,308.15
5. Step 5: Solve for x
   x = 2,004,308.15/1,604.04
6. Step 6: Final answer
   x = 1,249.54