Finding the Fourth Proportional to 1,017.59, 1,403.08 and 624.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.59 : 1,403.08 = 624.27 : x
2. Step 2: Convert to fraction form
   1,017.59/1,403.08 = 624.27/x
3. Step 3: Cross multiply
   1,017.59x = 1,403.08 × 624.27
4. Step 4: Simplify right side
   1,017.59x = 875,900.75
5. Step 5: Solve for x
   x = 875,900.75/1,017.59
6. Step 6: Final answer
   x = 860.76