Finding the Fourth Proportional to 1,017.09, 1,396.10 and 904.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.09 : 1,396.10 = 904.10 : x
2. Step 2: Convert to fraction form
   1,017.09/1,396.10 = 904.10/x
3. Step 3: Cross multiply
   1,017.09x = 1,396.10 × 904.10
4. Step 4: Simplify right side
   1,017.09x = 1,262,209.29
5. Step 5: Solve for x
   x = 1,262,209.29/1,017.09
6. Step 6: Final answer
   x = 1,241.00