Finding the Fourth Proportional to 1,017.59, 1,522.87 and 627.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.59 : 1,522.87 = 627.44 : x
2. Step 2: Convert to fraction form
   1,017.59/1,522.87 = 627.44/x
3. Step 3: Cross multiply
   1,017.59x = 1,522.87 × 627.44
4. Step 4: Simplify right side
   1,017.59x = 955,509.55
5. Step 5: Solve for x
   x = 955,509.55/1,017.59
6. Step 6: Final answer
   x = 938.99