Finding the Fourth Proportional to 1,151.28, 1,588.77 and 627.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.28 : 1,588.77 = 627.31 : x
2. Step 2: Convert to fraction form
   1,151.28/1,588.77 = 627.31/x
3. Step 3: Cross multiply
   1,151.28x = 1,588.77 × 627.31
4. Step 4: Simplify right side
   1,151.28x = 996,654.50
5. Step 5: Solve for x
   x = 996,654.50/1,151.28
6. Step 6: Final answer
   x = 865.69