Finding the Fourth Proportional to 1,404, 1,938.42 and 1,256.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404 : 1,938.42 = 1,256.38 : x
2. Step 2: Convert to fraction form
   1,404/1,938.42 = 1,256.38/x
3. Step 3: Cross multiply
   1,404x = 1,938.42 × 1,256.38
4. Step 4: Simplify right side
   1,404x = 2,435,387.27
5. Step 5: Solve for x
   x = 2,435,387.27/1,404
6. Step 6: Final answer
   x = 1,734.61