Finding the Fourth Proportional to 1,179.84, 1,628.38 and 682.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.84 : 1,628.38 = 682.78 : x
2. Step 2: Convert to fraction form
   1,179.84/1,628.38 = 682.78/x
3. Step 3: Cross multiply
   1,179.84x = 1,628.38 × 682.78
4. Step 4: Simplify right side
   1,179.84x = 1,111,825.30
5. Step 5: Solve for x
   x = 1,111,825.30/1,179.84
6. Step 6: Final answer
   x = 942.35