Finding the Fourth Proportional to 1,017.10, 1,403.59 and 551.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.10 : 1,403.59 = 551.35 : x
2. Step 2: Convert to fraction form
   1,017.10/1,403.59 = 551.35/x
3. Step 3: Cross multiply
   1,017.10x = 1,403.59 × 551.35
4. Step 4: Simplify right side
   1,017.10x = 773,869.35
5. Step 5: Solve for x
   x = 773,869.35/1,017.10
6. Step 6: Final answer
   x = 760.86