Finding the Fourth Proportional to 1,017.12, 1,403.63 and 551.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.12 : 1,403.63 = 551.37 : x
2. Step 2: Convert to fraction form
   1,017.12/1,403.63 = 551.37/x
3. Step 3: Cross multiply
   1,017.12x = 1,403.63 × 551.37
4. Step 4: Simplify right side
   1,017.12x = 773,916.72
5. Step 5: Solve for x
   x = 773,916.72/1,017.12
6. Step 6: Final answer
   x = 760.89