Finding the Fourth Proportional to 1,017.43, 1,404.06 and 551.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.43 : 1,404.06 = 551.68 : x
2. Step 2: Convert to fraction form
   1,017.43/1,404.06 = 551.68/x
3. Step 3: Cross multiply
   1,017.43x = 1,404.06 × 551.68
4. Step 4: Simplify right side
   1,017.43x = 774,586.24
5. Step 5: Solve for x
   x = 774,586.24/1,017.43
6. Step 6: Final answer
   x = 761.32