Finding the Fourth Proportional to 1,404.38, 1,938.93 and 1,256.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.38 : 1,938.93 = 1,256.75 : x
2. Step 2: Convert to fraction form
   1,404.38/1,938.93 = 1,256.75/x
3. Step 3: Cross multiply
   1,404.38x = 1,938.93 × 1,256.75
4. Step 4: Simplify right side
   1,404.38x = 2,436,740.58
5. Step 5: Solve for x
   x = 2,436,740.58/1,404.38
6. Step 6: Final answer
   x = 1,735.11