Finding the Fourth Proportional to 1,016.86, 1,403.24 and 551.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.86 : 1,403.24 = 551.11 : x
2. Step 2: Convert to fraction form
   1,016.86/1,403.24 = 551.11/x
3. Step 3: Cross multiply
   1,016.86x = 1,403.24 × 551.11
4. Step 4: Simplify right side
   1,016.86x = 773,337.47
5. Step 5: Solve for x
   x = 773,337.47/1,016.86
6. Step 6: Final answer
   x = 760.52