Finding the Fourth Proportional to 1,017.50, 1,404.16 and 551.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.50 : 1,404.16 = 551.76 : x
2. Step 2: Convert to fraction form
   1,017.50/1,404.16 = 551.76/x
3. Step 3: Cross multiply
   1,017.50x = 1,404.16 × 551.76
4. Step 4: Simplify right side
   1,017.50x = 774,759.32
5. Step 5: Solve for x
   x = 774,759.32/1,017.50
6. Step 6: Final answer
   x = 761.43