Finding the Fourth Proportional to 2,390.80, 3,587.60 and 1,004.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.80 : 3,587.60 = 1,004.02 : x
2. Step 2: Convert to fraction form
   2,390.80/3,587.60 = 1,004.02/x
3. Step 3: Cross multiply
   2,390.80x = 3,587.60 × 1,004.02
4. Step 4: Simplify right side
   2,390.80x = 3,602,022.15
5. Step 5: Solve for x
   x = 3,602,022.15/2,390.80
6. Step 6: Final answer
   x = 1,506.62