Finding the Fourth Proportional to 1,904.56, 2,855.64 and 1,070.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,904.56 : 2,855.64 = 1,070.30 : x
2. Step 2: Convert to fraction form
   1,904.56/2,855.64 = 1,070.30/x
3. Step 3: Cross multiply
   1,904.56x = 2,855.64 × 1,070.30
4. Step 4: Simplify right side
   1,904.56x = 3,056,391.49
5. Step 5: Solve for x
   x = 3,056,391.49/1,904.56
6. Step 6: Final answer
   x = 1,604.78