Finding the Fourth Proportional to 1,017.09, 1,403.57 and 551.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.09 : 1,403.57 = 551.34 : x
2. Step 2: Convert to fraction form
   1,017.09/1,403.57 = 551.34/x
3. Step 3: Cross multiply
   1,017.09x = 1,403.57 × 551.34
4. Step 4: Simplify right side
   1,017.09x = 773,844.28
5. Step 5: Solve for x
   x = 773,844.28/1,017.09
6. Step 6: Final answer
   x = 760.84