Finding the Fourth Proportional to 1,150.57, 1,587.78 and 626.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.57 : 1,587.78 = 626.60 : x
2. Step 2: Convert to fraction form
   1,150.57/1,587.78 = 626.60/x
3. Step 3: Cross multiply
   1,150.57x = 1,587.78 × 626.60
4. Step 4: Simplify right side
   1,150.57x = 994,899.82
5. Step 5: Solve for x
   x = 994,899.82/1,150.57
6. Step 6: Final answer
   x = 864.71