Finding the Fourth Proportional to 1,017.99, 1,404.27 and 624.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.99 : 1,404.27 = 624.33 : x
2. Step 2: Convert to fraction form
   1,017.99/1,404.27 = 624.33/x
3. Step 3: Cross multiply
   1,017.99x = 1,404.27 × 624.33
4. Step 4: Simplify right side
   1,017.99x = 876,727.89
5. Step 5: Solve for x
   x = 876,727.89/1,017.99
6. Step 6: Final answer
   x = 861.23