Finding the Fourth Proportional to 1,372.46, 1,891.94 and 1,040.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.46 : 1,891.94 = 1,040.28 : x
2. Step 2: Convert to fraction form
   1,372.46/1,891.94 = 1,040.28/x
3. Step 3: Cross multiply
   1,372.46x = 1,891.94 × 1,040.28
4. Step 4: Simplify right side
   1,372.46x = 1,968,147.34
5. Step 5: Solve for x
   x = 1,968,147.34/1,372.46
6. Step 6: Final answer
   x = 1,434.03