Finding the Fourth Proportional to 1,180.98, 1,629.78 and 683.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.98 : 1,629.78 = 683.78 : x
2. Step 2: Convert to fraction form
   1,180.98/1,629.78 = 683.78/x
3. Step 3: Cross multiply
   1,180.98x = 1,629.78 × 683.78
4. Step 4: Simplify right side
   1,180.98x = 1,114,402.82
5. Step 5: Solve for x
   x = 1,114,402.82/1,180.98
6. Step 6: Final answer
   x = 943.63