Finding the Fourth Proportional to 1,128.26, 1,687.52 and 1,004.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.26 : 1,687.52 = 1,004.06 : x
2. Step 2: Convert to fraction form
   1,128.26/1,687.52 = 1,004.06/x
3. Step 3: Cross multiply
   1,128.26x = 1,687.52 × 1,004.06
4. Step 4: Simplify right side
   1,128.26x = 1,694,365.40
5. Step 5: Solve for x
   x = 1,694,365.40/1,128.26
6. Step 6: Final answer
   x = 1,501.76