Finding the Fourth Proportional to 1,017.81, 1,405.89 and 738.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.81 : 1,405.89 = 738.97 : x
2. Step 2: Convert to fraction form
   1,017.81/1,405.89 = 738.97/x
3. Step 3: Cross multiply
   1,017.81x = 1,405.89 × 738.97
4. Step 4: Simplify right side
   1,017.81x = 1,038,907.02
5. Step 5: Solve for x
   x = 1,038,907.02/1,017.81
6. Step 6: Final answer
   x = 1,020.73