Finding the Fourth Proportional to 1,151.31, 1,588.87 and 627.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.31 : 1,588.87 = 627.34 : x
2. Step 2: Convert to fraction form
   1,151.31/1,588.87 = 627.34/x
3. Step 3: Cross multiply
   1,151.31x = 1,588.87 × 627.34
4. Step 4: Simplify right side
   1,151.31x = 996,758.57
5. Step 5: Solve for x
   x = 996,758.57/1,151.31
6. Step 6: Final answer
   x = 865.76