Finding the Fourth Proportional to 1,790.28, 2,470.61 and 1,004.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,790.28 : 2,470.61 = 1,004.31 : x
2. Step 2: Convert to fraction form
   1,790.28/2,470.61 = 1,004.31/x
3. Step 3: Cross multiply
   1,790.28x = 2,470.61 × 1,004.31
4. Step 4: Simplify right side
   1,790.28x = 2,481,258.33
5. Step 5: Solve for x
   x = 2,481,258.33/1,790.28
6. Step 6: Final answer
   x = 1,385.96