Finding the Fourth Proportional to 1,017.47, 1,404.11 and 551.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.47 : 1,404.11 = 551.72 : x
2. Step 2: Convert to fraction form
   1,017.47/1,404.11 = 551.72/x
3. Step 3: Cross multiply
   1,017.47x = 1,404.11 × 551.72
4. Step 4: Simplify right side
   1,017.47x = 774,676.32
5. Step 5: Solve for x
   x = 774,676.32/1,017.47
6. Step 6: Final answer
   x = 761.37