Finding the Fourth Proportional to 1,017.52, 1,404.24 and 624.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.52 : 1,404.24 = 624.64 : x
2. Step 2: Convert to fraction form
   1,017.52/1,404.24 = 624.64/x
3. Step 3: Cross multiply
   1,017.52x = 1,404.24 × 624.64
4. Step 4: Simplify right side
   1,017.52x = 877,144.47
5. Step 5: Solve for x
   x = 877,144.47/1,017.52
6. Step 6: Final answer
   x = 862.04