Finding the Fourth Proportional to 1,151.55, 1,589.16 and 627.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.55 : 1,589.16 = 627.59 : x
2. Step 2: Convert to fraction form
   1,151.55/1,589.16 = 627.59/x
3. Step 3: Cross multiply
   1,151.55x = 1,589.16 × 627.59
4. Step 4: Simplify right side
   1,151.55x = 997,340.92
5. Step 5: Solve for x
   x = 997,340.92/1,151.55
6. Step 6: Final answer
   x = 866.09