Finding the Fourth Proportional to 1,397.94, 1,926.48 and 1,004.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.94 : 1,926.48 = 1,004.28 : x
2. Step 2: Convert to fraction form
   1,397.94/1,926.48 = 1,004.28/x
3. Step 3: Cross multiply
   1,397.94x = 1,926.48 × 1,004.28
4. Step 4: Simplify right side
   1,397.94x = 1,934,725.33
5. Step 5: Solve for x
   x = 1,934,725.33/1,397.94
6. Step 6: Final answer
   x = 1,383.98