Finding the Fourth Proportional to 1,017.63, 1,404.32 and 551.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.63 : 1,404.32 = 551.88 : x
2. Step 2: Convert to fraction form
   1,017.63/1,404.32 = 551.88/x
3. Step 3: Cross multiply
   1,017.63x = 1,404.32 × 551.88
4. Step 4: Simplify right side
   1,017.63x = 775,016.12
5. Step 5: Solve for x
   x = 775,016.12/1,017.63
6. Step 6: Final answer
   x = 761.59