Finding the Fourth Proportional to 1,020.94, 1,399.72 and 1,002.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.94 : 1,399.72 = 1,002.49 : x
2. Step 2: Convert to fraction form
   1,020.94/1,399.72 = 1,002.49/x
3. Step 3: Cross multiply
   1,020.94x = 1,399.72 × 1,002.49
4. Step 4: Simplify right side
   1,020.94x = 1,403,205.96
5. Step 5: Solve for x
   x = 1,403,205.96/1,020.94
6. Step 6: Final answer
   x = 1,374.42