Finding the Fourth Proportional to 1,158.21, 1,598.33 and 627.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.21 : 1,598.33 = 627.10 : x
2. Step 2: Convert to fraction form
   1,158.21/1,598.33 = 627.10/x
3. Step 3: Cross multiply
   1,158.21x = 1,598.33 × 627.10
4. Step 4: Simplify right side
   1,158.21x = 1,002,310.92
5. Step 5: Solve for x
   x = 1,002,310.92/1,158.21
6. Step 6: Final answer
   x = 865.40