Finding the Fourth Proportional to 1,017.20, 1,404.03 and 597.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.20 : 1,404.03 = 597.57 : x
2. Step 2: Convert to fraction form
   1,017.20/1,404.03 = 597.57/x
3. Step 3: Cross multiply
   1,017.20x = 1,404.03 × 597.57
4. Step 4: Simplify right side
   1,017.20x = 839,006.21
5. Step 5: Solve for x
   x = 839,006.21/1,017.20
6. Step 6: Final answer
   x = 824.82