Finding the Fourth Proportional to 1,406.57, 1,939.88 and 1,028.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.57 : 1,939.88 = 1,028.93 : x
2. Step 2: Convert to fraction form
   1,406.57/1,939.88 = 1,028.93/x
3. Step 3: Cross multiply
   1,406.57x = 1,939.88 × 1,028.93
4. Step 4: Simplify right side
   1,406.57x = 1,995,993.60
5. Step 5: Solve for x
   x = 1,995,993.60/1,406.57
6. Step 6: Final answer
   x = 1,419.06