Finding the Fourth Proportional to 1,017.48, 1,404.10 and 551.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.48 : 1,404.10 = 551.73 : x
2. Step 2: Convert to fraction form
   1,017.48/1,404.10 = 551.73/x
3. Step 3: Cross multiply
   1,017.48x = 1,404.10 × 551.73
4. Step 4: Simplify right side
   1,017.48x = 774,684.78
5. Step 5: Solve for x
   x = 774,684.78/1,017.48
6. Step 6: Final answer
   x = 761.38