Finding the Fourth Proportional to 1,017.47, 1,404.12 and 624.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.47 : 1,404.12 = 624.26 : x
2. Step 2: Convert to fraction form
   1,017.47/1,404.12 = 624.26/x
3. Step 3: Cross multiply
   1,017.47x = 1,404.12 × 624.26
4. Step 4: Simplify right side
   1,017.47x = 876,528.93
5. Step 5: Solve for x
   x = 876,528.93/1,017.47
6. Step 6: Final answer
   x = 861.48