Finding the Fourth Proportional to 1,180.76, 1,629.39 and 649.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.76 : 1,629.39 = 649.55 : x
2. Step 2: Convert to fraction form
   1,180.76/1,629.39 = 649.55/x
3. Step 3: Cross multiply
   1,180.76x = 1,629.39 × 649.55
4. Step 4: Simplify right side
   1,180.76x = 1,058,359.69
5. Step 5: Solve for x
   x = 1,058,359.69/1,180.76
6. Step 6: Final answer
   x = 896.34